SANLIURFA, TURKEY - SEPTEMBER 22: Syrians, fleeing from clashes between the Islamic State of Iraq and Levant (ISIL) militants and Democratic Union Party (PYD) forces in the Tal Abyad district of Syria's Ar-Raqqah Governorate, passing through Turkish border gate on September 22, 2014 in Suruc district of Sanliurfa province of Turkey. (Photo by Orhan Cicek/Anadolu Agency/Getty Images)

Peshmerga forces hand out water bottles and show the way to displaced Iraqi families from the Yazidi community as they cross the Iraqi-Syrian border at the Fishkhabur crossing, in northern Iraq, on August 11, 2014. At least 20,000 civilians, most of whom are from the Yazidi community, who had been besieged by jihadists on a mountain in northern Iraq have safely escaped to Syria and been escorted by Kurdish forces back into Iraq, officials said. The breakthrough coincided with US air raids on Islamic State fighters in the Sinjar area of northwestern Iraq on August 9, and Kurdish forces from Iraq, Syria and Turkey working together to break the siege of Mount Sinjar and rescue the displaced. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

Displaced Iraqi families from the Yazidi community cross the Iraqi-Syrian border at the Fishkhabur crossing to safety, in northern Iraq, on August 13, 2014. At least 20,000 civilians, most of whom are from the Yazidi community, who had been besieged by jihadists on a mountain in northern Iraq have safely escaped to Syria and been escorted by Kurdish forces back into Iraq, officials said. The breakthrough coincided with US air raids on Islamic State fighters in the Sinjar area of northwestern Iraq on August 9, and Kurdish forces from Iraq, Syria and Turkey working together to break the siege of Mount Sinjar and rescue the displaced AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

French President Francois Hollande holds a press conference with Madagascar president (unseen) at the Elysee presidential palace in Paris on September 19, 2014. Earlier today, Hollande made a statement on France's first air strike in Iraq. French jets carried out their first air strike against Islamic State militants in Iraq, successfully destroying their target, Hollande announced, vowing that more operations would follow. Hollande himself visited Iraq late last week -- the most high-profile leader to do so since jihadists stormed across the country -- and Paris hosted an international conference on the crisis last Monday. AFP PHOTO FRED DUFOUR (Photo credit should read FRED DUFOUR/AFP/Getty Images)

U.S. President Barack Obama leaves after speaking during a televised address at the White House in Washington, D.C., U.S., on Wednesday, Sept. 10, 2014. Obama pledged a relentless campaign to destroy Islamic State extremists in Iraq and Syria, with Middle Eastern allies such as Saudi Arabia and Jordan playing crucial supporting roles. Photographer: Saul Loeb/Pool via Bloomberg

U.S. President Barack Obama speaks during a televised address at the White House in Washington, D.C., U.S., on Wednesday, Sept. 10, 2014. Obama pledged a relentless campaign to destroy Islamic State extremists in Iraq and Syria, with Middle Eastern allies such as Saudi Arabia and Jordan playing crucial supporting roles. Photographer: Saul Loeb/Pool via Bloomberg

British Prime Minister David Cameron leaves 10 Downing Street in central London on 3, September 2014, after chairing an emergency meeting following the execution of a second US journalist by Islamist fighters in Iraq and the threat that a British hostage will be next. In a video showing the severed head of 31-year-old Steven Sotloff, a masked militant warned a British man, widely identified as David Cawthorne Haines, would be killed in response to US air strikes against militants in northern Iraq. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)

A rebel fightercarries homemade mortar rounds on September 3, 2013 in the northern Syrian city of Raqqa. UN leader Ban Ki-moon said on September 3, 2013 that a military strike on Syria over the use of chemical weapons could worsen the country's conflict. AFP PHOTO / MEZAR MATAR (Photo credit should read MEZAR MATAR/AFP/Getty Images)

Kurdish Peshmerga fighters hold a position on the front line in the Gwer district, 40 kilometres south of Arbil, the capital of the Kurdish autonomous region in northern Iraq, on September 18, 2014. France said that it will follow the United States in launching air strikes against the Islamic State group in Iraq, as the jihadists posted their latest video of a Western hostage. AFP PHOTO / SAFIN HAMED (Photo credit should read SAFIN HAMED/AFP/Getty Images)

Members of United Nations Disengagement Observer Force Zone (UNDOF) use binoculars to watch smoke rising in the distance caused by fighting between forces loyal to Syrian President Bashar Assad and rebels over the control of the Quneitra border crossing, on August 27, 2014. Syrian rebels, including Al-Qaeda's affiliate Al-Nusra Front, seized control of the Syrian crossing with the Israeli-occupied Golan Heights today, the Britain-based Syrian Observatory for Human Rights said. AFP PHOTO / JACK GUEZ (Photo credit should read JACK GUEZ/AFP/Getty Images)

Druze men stand in the Israeli-annexed Golan Heights as they look at smoke rising in the distance caused by fighting between forces loyal to Syrian President Bashar Assad and rebels over the control of the Quneitra border crossing, on August 27, 2014. Syrian rebels, including Al-Qaeda's affiliate Al-Nusra Front, seized control of the Syrian crossing with the Israeli-occupied Golan Heights today, the Britain-based Syrian Observatory for Human Rights said. AFP PHOTO / JACK GUEZ (Photo credit should read JACK GUEZ/AFP/Getty Images)

MOSUL, IRAQ - AUGUST 9: Fierce clashes keep going on between Peshmerga forces and Islamic State-led armed groups outside of Makhmur district of Mosul, Iraq on August 9, 2014. It's stated that Peshmerga forces silence the Islamic State members with attacks staged with Iraqi air forces' strikes, Katyusha rockets, howitzers and heavy weapons. (Photo by Feriq Ferec/Anadolu Agency/Getty Images)

MOSUL, IRAQ - AUGUST 9: Fierce clashes keep going on between Peshmerga forces and Islamic State-led armed groups outside of Makhmur district of Mosul, Iraq on August 9, 2014. It's stated that Peshmerga forces silence the Islamic State members with attacks staged with Iraqi air forces' strikes, Katyusha rockets, howitzers and heavy weapons. (Photo by Feriq Ferec/Anadolu Agency/Getty Images)

A Peshmerga fighter looks at the remains of a car, bearing an image of the trademark jihadist flag, which reportedly belonged to Islamic State (IS) militants after it was targeted by an American air strike in the village of Baqufa, north of Mosul, on August 18, 2014. Kurdish peshmerga fighters backed by federal forces and US warplanes pressed a counter-offensive Monday against jihadists after retaking Iraq's largest dam, as the United States and Britain stepped up their military involvement. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

MOSUL, IRAQ - AUGUST 19: Iraqi army forces and Peshmerga forces take security precautions against possible Islamic State (IS)-led terrorist groups' attacks with heavy weapons and armoured vehicles around the Mosul Dam on August 19, 2014 in Mosul, Iraq. IS-led militants had seized the control of the dam and they were driven after the U.S. airstrikes and ground offensive of Iraqi troops. (Photo by Sivan Siddik/Anadolu Agency/Getty Images)

KHAZIR FRONTLINE, KRG, IRAQ - 2014/08/26: A Peshmerga soldier makes a victory sign on top of a bunker at the Khazir Frontline. Khazir refugee camp is located outside Kalak, a town halfway on the road between Erbil and Mosul. It was overrun by ISIS militants on the 7th of August following an unprecedented push of the Caliphate into Kurdish territory. Its thousands of Iraqi and Arab refugees were forced to flee again as the now deserted camp has become the new frontline between the Peshmerga and ISIS. It is the theatre of frequent U.S. airstrikes that have helped halt the ISIS advance into a stalemate situation. (Photo by Vianney Le Caer/Pacific Press/LightRocket via Getty Images)

SALADIN, IRAQ - AUGUST 31: Shiite militias hold the Hezbollah flag after Iraqi forces have entered the northern town of Amirli which had been under the siege of Islamic State militants for over two months in Saladin ,Iraq on August 31, 2014. Supported by Kurdish forces and Shiite militias, the Iraqi army launched an offensive shortly after the U.S. carried out airstrikes against Islamic State (IS) positions near the town, and dropped aid for the nearly 20,000 Shiite Turkmen trapped in Amirli. The government forces and Kurdish peshmerga forces have been fighting against the militant group to block their advance. (Stringer - Anadolu Agency)

SALADIN, IRAQ - AUGUST 31: Iraqi armed forces have entered the northern town of Amirli which had been under the siege of Islamic State militants for over two months in Saladin ,Iraq on August 31, 2014. Supported by Kurdish forces and Shiite militias, the Iraqi army launched an offensive shortly after the U.S. carried out airstrikes against Islamic State (IS) positions near the town, and dropped aid for the nearly 20,000 Shiite Turkmen trapped in Amirli. The government forces and Kurdish peshmerga forces have been fighting against the militant group to block their advance. (Stringer - Anadolu Agency)

A screen grab from a video posted to YouTube by ISIS that claims to show journalist James Foley, who was abducted in 2012 while covering the Syria civil war, being beheaded.

Lt. Gen. William C. Mayville Jr., Joint Staff Director of Operations Director of Operations, shows before and after photos as he speaks on the airstrikes in Syria during a briefing at the Pentagon September 23, 2014 in Washington, DC. Mayville briefed the press about US and Arab nation joint airstrikes against Islamic State(IS) group targets in Syria and unilateral airstrikes against an al-Qaeda group in Syria. AFP PHOTO/Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: Rubble of destroyed building and a pickup truck, allegedly belonging to Al-Nusra Front, are seen following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: Rubble of destroyed building, allegedly belonging to Al-Nusra Front, is seen following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: Syrians inspect the rubble of destroyed building, allegedly belonging to Al-Nusra Front following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: A Syrian inspects the rubble of destroyed building, allegedly belonging to Al-Nusra Front following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - SEPTEMBER 25: A Syrian inspects the rubble of destroyed building, allegedly belonging to Al-Nusra Front following the U.S.-led coalition's airstrikes against the Islamic State of Iraq and the Levant (ISIL) on a residential area in northern Aleppo, Syria on September 25, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 2: Photograph taken from Suruc district of Sanliurfa, Turkey shows that smoke rises following the shelling as the clashes near to the Turkish-Syrian border intensify between Islamic State of Iraq and the Levant (ISIL) and Syrian Kurdish armed groups in Ayn al-Arab (Kobane), on October 2, 2014. (Photo by Ismail Hakki Demir/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 2: Photograph taken from Suruc district of Sanliurfa, Turkey shows that smoke rises following the shelling as the clashes near to the Turkish-Syrian border intensify between Islamic State of Iraq and the Levant (ISIL) and Syrian Kurdish armed groups in Ayn al-Arab (Kobane), on October 2, 2014. (Photo by Ismail Hakki Demir/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 2: Turkish armed forces take security measures in Suruc district of Sanliurfa, Turkey as the clashes near to the Turkish-Syrian border intensify between Islamic State of Iraq and the Levant (ISIL) and Syrian Kurdish armed groups in Ayn al-Arab (Kobane), on October 2, 2014. (Photo by Ismail Hakki Demir/Anadolu Agency/Getty Images)

US Vice President Joe Biden (L) shakes hands with Turkish Cypriot leader Dervis Eroglu (R) during a meeting in the northern Turkish-controlled area of Nicosia, the capital of the east Mediterranean island of Cyprus on May 22, 2014. The breakaway state that Eroglu leads is recognised only by Turkey, and the US vice president moved swiftly to reassure Greek Cypriots that the meeting signalled no change in US policy. AFP PHOTO / YIANNIS KOURTOGLOU (Photo credit should read Yiannis Kourtoglou/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 05: After the howitzer shell fired from Syria, where the clashes between Islamic State of Iraq and Levant (ISIL) and Kurdish armed troops continue, into Turkey, Turkish military forces take security measures at the border line in the Suruc district of Sanliurfa, Turkey, on October 5, 2014. Military tanks are sent to Turkey - Syria border line. Veli Gurgah / Anadolu Agency

SANLIURFA, TURKEY - OCTOBER 5: Photograph taken from Sanliurfa's Suruc district, Turkey, shows smoke rises from Syria's Ayn al-Arab city (Kobani) following the shelling during clashes between Islamic State of Iraq and the Levant (ISIL) and Kurdish armed groups in Ayn al-Arab city on October 5, 2014. (Photo by Emin Menguarslan/Anadolu Agency/Getty Images)

Smoke rises from the Syrian town of Ain al-Arab, known as Kobane by the Kurds, seen from the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 5, 2014. Turkey warned on October 4 it would not hesitate to strike back at Islamic State jihadists if they attacked Turkish troops stationed at Ankara's exclave inside Syria. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 06: Tanks of Turkish Armed Forces are seen on the hills at the Turkey - Syria borderline in the Suruc district of Sanliurfa Turkey, as the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed groups continue in Ayn al-Arab city (Kobani) on October 6, 2014. (Photo by Ozge Elif Kizil/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 6 : Turkish Armed Forces soldiers are seen on the hills at the Turkey - Syria boder in Sanliurfa, Turkey as the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed groups continue in Ayn al-Arab city (Kobani) on October 6, 2014. (Photo by Halil Fidan/Anadolu Agency/Getty Images)

An Islamic State (IS) flag is placed on a hill in the Syrian town of Ain al-Arab, known as Kobane by the Kurds, as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 6, 2014. Two flags of Islamic State (IS) jihadists seeking to take the Syrian town of Kobane were flying on the eastern side of the town, an AFP photographer reported. The flags, black with the Arabic lettering of the group, were seen by the photographer from the Turkish side of the border. One flew on a building while another larger flag was planted on a hill. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 07: A photo taken from the Suruc district of Sanliurfa, Turkey shows smoke rises from Ayn al-Arab city (Kobani) of Syria after the US-led coalition bombed the targets of the Islamic State of Iraq and the Levant (ISIL) in Ayn al-Arab, on October 7, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

Smoke rises from the southwest of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, following air strikes as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Smoke rises from the southwest of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, following air strikes as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Alleged Islamic State (IS) militants stand next to a black IS flag atop a hill in at the eastern part of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Smoke rises from the southwest of the Syrian town of Ain al-Arab, known as Kobane by the Kurds, following air strikes as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, on October 7, 2014. Fresh air strikes by the US-led coalition hit positions held by Islamic State jihadists in the southwest of the key Syrian border town of Ain al-Arab (Kobane), according to an AFP journalist just across the border in Turkey. The strikes came a day after the extremists pushed into Kobane, seizing three districts in the city's east after fierce street battles with its Kurdish defenders. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows destroyed buildings and rising smoke as a result of clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups in Kobane (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Emin Menguarslan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows smoke rises during the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups in Kobani (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows militants of Islamic State of Iraq and the Levant (ISIL) as they are walking in the town of Kobani during the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups continue in Kobani (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 9: A photograph taken from the border line in Suruc district of Sanliurfa, southeastern province of Turkey, shows smoke rises during the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups in Kobani (Ayn al-Arab) city of Syria on October 9, 2014. (Photo by Ibrahim Erikan/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 14: (TURKEY OUT) Abandoned houses in the Syrian city of Kobani after fighting between Syrian Kurds and militants from Islamic State, on October 14, 2014 as seen from the outskirts of Suruc, on the Turkey-Syria border. The strategic border town of Kobani has been beseiged by Islamic State militants since mid-September forcing more than 200,000 people to flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 14: Turkish security forcers members stand guard the gate while the wounded Syrian Kurds are carried to the Turkish side of boder in Mursitpinar crossing in Turkey's Sanliurfa province on October 14, 2014, as the clashes between the Islamic State of Iraq and Levant (ISIL) and Kurdish armed troops continue in Kobane (Ayn al-arab) city of Syria. (Photo by Omer Urer/Anadolu Agency/Getty Images)

A Kurdish man stands next to another looking through binoculars towards the Syrian town of Ain al-Arab, known as Kobane by the Kurds, from the Turkish-Syrian border in the southeastern village of Mursitpinar in the Sanliurfa province on October 15, 2014. US-led aircraft will continue bombing near the Syrian town of Ain al-Arab (Kobane) and in western Iraq, President Barack Obama said after talks with military leaders from an international coalition fighting the Islamic State group. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

Flames rise from an explosion in the Syrian town of Kobane, also known as Ain al-Arab, after a US-led coalition strike, as seen from the Turkish border in the southeastern village of Mursitpinar, Sanliurfa province, on October 18, 2014. Turkey is turning a deaf ear to insistent pressure to take a more pro-active stance in the fight against Islamic State (IS) jihadists, adding to existing strains with the West under President Recep Tayyip Erdogan. Western diplomats have repeatedly made clear they want to see the key NATO member play a key role in the coalition against the militants, who are battling for the Syrian town Kobane just a few kilometers from Turkey. AFP PHOTO / ARIS MESSINIS (Photo credit should read ARIS MESSINIS/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: (TURKEY OUT) An explosion rocks the Syrian city of Kobani during an airstrike by the US-led coalition during fighting between Syrian Kurds and the militants of Islamic State group, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 18, 2014. Kurdish fighters in Syrian city of Kobani have pushed back Islamic State militants in a number of locations as U.S. airstrikes on ISIS positions continue in and around the city. Since mid-September more than 200,000 people from Kobani flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: (TURKEY OUT) Heavy smoke rises following an airstrike by the US-led coalition aircraft in Kobani, Syria, during fighting between Syrian Kurds and the militants of Islamic State group, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 18, 2014. Kurdish fighters in Syrian city of Kobani have pushed back Islamic State militants in a number of locations as U.S. airstrikes on ISIS positions continue in and around the city. Since mid-September more than 200,000 people from Kobani flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

GAZIANTEP, TURKEY - OCTOBER 18: A photograph taken from Suruc district of Sanliurfa, Turkey, shows flames and smoke rising from an explosion in the Syrian border town of Kobani (Ayn al-Arab) following a US-led coalition airstrike hits an Islamic State of Iraq and the Levant (ISIL) target on October 18, 2014. (Photo by Omer Urer/Anadolu Agency/Getty Images)

GAZIANTEP, TURKEY - OCTOBER 18: A photograph taken from Suruc district of Sanliurfa, Turkey, shows flames and smoke rising from an explosion in the Syrian border town of Kobani (Ayn al-Arab) following a US-led coalition airstrike hits an Islamic State of Iraq and the Levant (ISIL) target on October 18, 2014. (Photo by Omer Urer/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: (TURKEY OUT) People are silhouetted on the top of a hill close to the border line between Turkey and Syria near Mursitpinar bordergate as they watch the U.S led airstrikes over the Syrian town of Kobani on October 18, 2014 in Sanliurfa, Turkey. Kurdish fighters in Syrian city of Kobani have pushed back Islamic State militants in a number of locations as U.S. airstrikes on ISIS positions continue in and around the city. Since mid-September more than 200,000 people from Kobani flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 18: A photograph taken from Suruc district of Sanliurfa, Turkey, shows flames rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 18, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

U.S. airstrike on Jeribe West Modular Refinery, Syria, Sept. 24, 2014. The United States conducted this strike as part of the President’s comprehensive strategy to degrade and ultimately defeat ISIL. Going forward, the U.S. military will continue to conduct targeted airstrikes against ISIL in Syria and Iraq as local forces go on the offensive against this terrorist group.

NVG footage of U.S. F-16's getting fuel from a U.S. KC-135 Stratotanker, Sept. 23, 2014, during air strikes against ISIL in Syria.

Flames rise following an explosion in the Syrian town of Kobane, also known as Ain al-Arab, as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. US President Barack Obama called his Turkish counterpart Recep Tayyip Erdogan and they pledged to step up the fight against the Islamic State group in Syria, the White House said. Kurdish fighters have been under IS assault for more than a month around Kobane, which has become a key prize as it is being fought under the gaze of the world's press massed just over the border in Turkey. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: People watch the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed group near the Syrian border town of Kobani (Ayn al-Arab), from Suruc district of Sanliurfa, Turkey on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

Kurdish people observe smoke rising from the Syrian town of Kobane, also known as Ain al-Arab, following an explosion as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. US President Barack Obama called his Turkish counterpart Recep Tayyip Erdogan and they pledged to step up the fight against the Islamic State group in Syria, the White House said. Kurdish fighters have been under IS assault for more than a month around Kobane, which has become a key prize as it is being fought under the gaze of the world's press massed just over the border in Turkey. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: A photograph taken from Suruc district of Sanliurfa, Turkey, shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the clashes between Islamic State of Iraq and Levant (ISIL) and Kurdish armed groups on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: People watch the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed group near the Syrian border town of Kobani (Ayn al-Arab), from Suruc district of Sanliurfa, Turkey on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: People watch the clashes between the Islamic State of Iraq and the Levant (ISIL) and Kurdish armed group near the Syrian border town of Kobani (Ayn al-Arab), from Suruc district of Sanliurfa, Turkey on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: (TURKEY OUT) An explosion rocks Syrian city of Kobane during a reported suicide car bomb attack by the militants of Islamic State (ISIS) group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 20, 2014 in Sanliurfa province, Turkey. According to Foreign Minister Mevlut Cavusoglu, Turkey will reportedly allow Iraqi Kurdish fighters to cross the Syrian border to fight Islamic State (IS) militants in the Syrian city of Kobane while the United States has sent planes to drop weapons, ammunition and medical supplies to Syrian Kurdish fighters around Kobane. (Photo by Gokhan Sahin/Getty Images)

Smoke and flames rise following an explosion in the Syrian town of Kobane, also known as Ain al-Arab, as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. Turkey dropped its refusal to allow Kurdish fighters over the border to defend the besieged Syrian town of Kobane, saying it was now helping Iraqi peshmerga to cross the frontier in a major policy shift. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

Smoke and flames rise following an explosion in the Syrian town of Kobane, also known as Ain al-Arab, as seen from the southeastern Turkish village of Mursitpinar in the Sanliurfa province on October 20, 2014. Turkey dropped its refusal to allow Kurdish fighters over the border to defend the besieged Syrian town of Kobane, saying it was now helping Iraqi peshmerga to cross the frontier in a major policy shift. AFP PHOTO / BULENT KILIC (Photo credit should read BULENT KILIC/AFP/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: A photo taken from the Suruc district of Sanliurfa, Turkey, shows that smoke rises after the Islamic State of Iraq and the Levant (ISIL) carried out a suicide attack with two bomb-laden vehicles in Kobani (Ayn al-Arab), Syria, on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: (TURKEY OUT) An explosion rocks Syrian city of Kobane during a reported suicide car bomb attack by the militants of Islamic State (ISIS) group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 20, 2014 in Sanliurfa province, Turkey. According to Foreign Minister Mevlut Cavusoglu, Turkey will reportedly allow Iraqi Kurdish fighters to cross the Syrian border to fight Islamic State (IS) militants in the Syrian city of Kobane while the United States has sent planes to drop weapons, ammunition and medical supplies to Syrian Kurdish fighters around Kobane. (Photo by Gokhan Sahin/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: (TURKEY OUT) An explosion rocks Syrian city of Kobane during a reported suicide car bomb attack by the militants of Islamic State (ISIS) group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border, October 20, 2014 in Sanliurfa province, Turkey. According to Foreign Minister Mevlut Cavusoglu, Turkey will reportedly allow Iraqi Kurdish fighters to cross the Syrian border to fight Islamic State (IS) militants in the Syrian city of Kobane while the United States has sent planes to drop weapons, ammunition and medical supplies to Syrian Kurdish fighters around Kobane. (Photo by Gokhan Sahin/Getty Images)

SIRNAK, TURKEY - OCTOBER 29: A boy, holding Iraqi Kurdish Regional Government, flashes V sign as people welcome Iraqi Kurdish Peshmerga forces' military convoy, carrying heavy weapons as it crosses into Turkey from the Habur border crossing in Sirnak province of Turkey, on October 29, 2014. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Ahmet Bolat/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 20: A photo taken from the Suruc district of Sanliurfa, Turkey, shows that smoke rises after the Islamic State of Iraq and the Levant (ISIL) carried out a suicide attack with two bomb-laden vehicles in Kobani (Ayn al-Arab), Syria, on October 20, 2014. (Photo by Murat Kula/Anadolu Agency/Getty Images)

SIRNAK, TURKEY - OCTOBER 29: People welcome Iraqi Kurdish Peshmerga forces' military convoy, carrying heavy weapons as it crosses into Turkey from the Habur border crossing in Sirnak province of Turkey, on October 29, 2014. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Ahmet Bolat/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30: Iraqi Kurdish Peshmerga military convoy, carrying heavy weapons belonging to Peshmerga forces, arrives in Suruc town, near the Syrian border, on their way to Syria to help defend the Syrian town of Kobani against ISIL militants on October 30, 2014 in Sanliurfa, Turkey. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30: Iraqi Kurdish Peshmerga military convoy, carrying heavy weapons belonging to Peshmerga forces, arrives in Suruc town, near the Syrian border, on their way to Syria to help defend the Syrian town of Kobani against ISIL militants on October 30, 2014 in Sanliurfa, Turkey. Iraqi Kurdish Regional Government has sent its forces to fight alongside the armed groups against Islamic State of Iraq and Levant (ISIL) militants in Kobani (Ayn al-Arab) within a special arrangement with Turkey. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

MOSUL, IRAQ - JULY 5 : An image grab taken from a video released on July 5, 2014 by Al-Furqan Media shows alleged Islamic State of Iraq and the Levant (ISIL) leader Abu Bakr al-Baghdadi preaching during Friday prayer at a mosque in Mosul.(Photo by Al-Furqan Media/Anadolu Agency/Getty Images)

MOSUL, IRAQ - JULY 5 : An image grab taken from a video released on July 5, 2014 by Al-Furqan Media shows alleged Islamic State of Iraq and the Levant (ISIL) leader Abu Bakr al-Baghdadi preaching during Friday prayer at a mosque in Mosul.(Photo by Al-Furqan Media/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30 : A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 30, 2014. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30 : A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 30, 2014. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - OCTOBER 30 : A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on October 30, 2014. (Photo by Rauf Maltas/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - NOVEMBER 9: Smoke rising during the clashes between Islamic State of Iraq and Levant (ISIL) members and armed groups in Kobani (Ayn al-Arab), is seen from Suruc district of Turkey's Sanliurfa on November 9, 2014. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - NOVEMBER 09: A photograph taken from Suruc district of Sanliurfa, Turkey, shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on November 09, 2014. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - NOVEMBER 09: A photograph taken from Suruc district of Sanliurfa, Turkey, shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on November 09, 2014. (Photo by Ali Ihsan Ozturk/Anadolu Agency/Getty Images)

SANLIURFA, TURKEY - JANUARY 16: A photograph taken from Suruc district of Sanliurfa, Turkey, near Turkish-Syrian border crossing shows smoke rising from the Syrian border town of Kobani (Ayn al-Arab) following the US-led coalition airstrikes against the Islamic State of Iraq and the Levant (ISIL) targets on January 16, 2015. (Photo by Halil Fidan/Anadolu Agency/Getty Images)

RAQQA, SYRIA - NOVEMBER 28: At least 5 people killed and cars,buildings destroyed during the air strikes by Syrian army warplanes on the ISIL-held northern city of Raqqa, Syria on November 28,2014. (Photo by Stringer/Anadolu Agency/Getty Images)

CF-18 Hornets fly in formation on their the departure for Operation IMPACT, in Cold Lake, Alberta on Tuesday October 21, 2014. The Canadian CF-18 Hornets are making their way to Kuwait, to join the fight against the Islamic State of Iraq and Syria. THE CANADIAN PRESS/Jason Franson

A Canadian CF-18 gets the go-ahead for takeoff at dusk at the military base in Dohar, Qatar on December 3, 1990. Defence Minister Rob Nicholson says an advance military team will leave Trenton, Ont., for Kuwait next week as Canada gears up to join the fight against Islamic State militants in Iraq. THE CANADIAN PRESS/Paul Chiasson

Military personnel guide a CF-18 Hornet into position at the CFB Cold Lake, in Cold Lake, Alberta on Tuesday October 21, 2014. The Canadian CF-18 Hornets are making their way to Kuwait, to join the fight against the Islamic State of Iraq and Syria. THE CANADIAN PRESS/Jason Franson

CF-18 Hornets fly in formation on their the departure for Operation IMPACT, in Cold Lake, Alberta on Tuesday October 21, 2014. The Canadian CF-18 Hornets are making their way to Kuwait, to join the fight against the Islamic State of Iraq and Syria. THE CANADIAN PRESS/Jason Franson

WASHINGTON (AP) - Ten weeks into its war against Islamic State extremists, the Pentagon is settling in for the long haul, short on big early successes but still banking on enlisting Syrians and Iraqis to fight the ground war so that U.S. troops won't have to.

The U.S. general overseeing the campaign on Friday predicted that the jihadists will be "much degraded" by airstrikes a year from now, in part because he is focusing attacks on those resources that enable IS to sustain itself and resupply its fighters.

On Friday, for example, the U.S. military said one of its six airstrikes overnight in Syria hit several IS petroleum storage tanks and a pumping station - sites that are central to the militants' ability to resupply their forces and generate revenue. Likewise, it said two coalition airstrikes in Iraq damaged or destroyed IS military targets near the contested town of Beiji, home of Iraq's largest oil refinery.

In his first public overview of the campaign he leads from the Florida headquarters of U.S. Central Command, Army Gen. Lloyd Austin cautioned against expecting quick progress. He said he cannot predict how long it will take to right a wobbly Iraqi army and build a viable opposition ground force in Syria.

"The campaign to destroy ISIL will take time, and there will be occasional setbacks along the way," Austin told a Pentagon news conference, "particularly in these early stages of the campaign as we coach and mentor a force (in Iraq) that is actively working to regenerate capability after years of neglect and poor leadership."

While hammering the jihadists daily from the air, the U.S. military is talking of a years-long effort - one that will require more than aerial bombardment, will show results only gradually and may eventually call for a more aggressive use of U.S. military advisers in Iraq.

"This isn't going to get solved through 18 airstrikes around a particular town in a particular place in Syria. It's going to take a long time," the Pentagon press secretary, Rear Adm. John Kirby, said Thursday, referring to a recent concentration of American airstrikes on the Syrian city of Kobani, near the Turkish border.

That is one reason why the Pentagon is preparing to set up a more formally organized command structure, known in military parlance as a joint task force, to lead and coordinate the campaign from a forward headquarters, perhaps in Kuwait. On Wednesday it formally named the campaign "Operation Inherent Resolve."

As of Thursday the U.S. had launched nearly 300 airstrikes in Iraq and nearly 200 in Syria, and allies had tallied fewer than 100, according to Central Command. Those figures don't capture the full scope of the effort because many airstrikes launch multiple bombs on multiple targets. Central Command said that as of Wednesday, U.S. and partner-nation air forces had dropped nearly 1,400 munitions.

Officials say the strikes have squeezed IS and slowed its battlefield momentum. More specifically, they claim they have destroyed an array of Islamic State military targets: command posts, sniper positions, artillery guns, armed trucks, tanks, mortar positions, buildings, mobile oil refineries and more. The Pentagon has shied from providing a body count, but Kirby said several hundred IS fighters have been killed in Kobani alone in recent days.

Yet the militants are making gains in some parts of Iraq, particular in Sunni-dominated Anbar province, even as they stall or retrench in other areas. At times they have appeared within reach of taking control of Syria's Kobani. Baghdad is not believed to be in imminent danger of falling but it is "certainly in their sights," Kirby said.

Some U.S. analysts call Obama's approach overly cautious, given the comparatively small number of airstrikes launched thus far and the president's refusal to involve U.S. soldiers more directly in the ground war.

Calling it an "unserious air war," analysts Mark Gunzinger and John Stillion of the Center for Strategic and Budgetary Assessments wrote this week on the center's website, "In the end, no matter the reason, the timorous use of air power against Islamic State fighters in Iraq and Syria is unlikely to reduce the territory under their control, curb the brutal murder of innocent civilians or prevent the creation of a sanctuary for an enemy that has sworn to continue its fight on a more global scale."

Others take a more approving view.

"The air war is really degrading their infrastructure," said Sen. Angus King, I-Maine, who just returned from a trip that included a briefing at the U.S. air operation center at al-Udeid air base in Qatar.

"At some point in the next several months, they are not going to have tanks, they are not going have (U.S.-made mine-resistant vehicles), they are not going have the stuff that they stole from the Iraqis. They are going to have AK-47s," he said, and at that point Iraqi and U.S.-trained Syrian opposition fighters can make inroads.