Story highlights Security officer's dad remembers dedication

President Barack Obama: "Chris Stevens was a friend"

Computer expert Sean Smith was renowned in the gamers' universe

They died in Benghazi with Chris Stevens, the U.S. ambassador to Libya

Tyrone Woods became a Navy SEAL after his mother suggested he join the military.

Friday afternoon, Cheryl Croft Bennett attended a ceremony to honor the life of her son, Ty, and grieve his death alongside three other Americans in Tuesday's assault on the U.S. Consulate in the Libyan city of Benghazi.

Woods, who had retired from the Navy, handled security for diplomats and perished with fellow former SEAL Glen Doherty, computer expert Sean Smith and U.S. Ambassador Chris Stevens

"Tyrone's friends and colleagues called him 'Rone,' and they relied on his courage and skill, honed over two decades as a Navy SEAL," Secretary of State Hillary Clinton said.

"In uniform, he served multiple tours in Iraq and Afghanistan. Since 2010, he protected American diplomatic personnel in dangerous posts from Central America to the Middle East. He had the hands of a healer as well as the arm of a warrior, earning distinction as a registered nurse and certified paramedic. All our hearts go out to Tyrone's wife Dorothy and his three sons, Tyrone Jr., Hunter, and Kai, who was born just a few months ago."

Photos: Photos: Attack on U.S. mission in Benghazi Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Attackers set the U.S. mission in Benghazi, Libya, on fire on September 11, 2012. The U.S. ambassador to Libya, Christopher Stevens, and three other U.S. nationals were killed during the attack. The Obama administration initially thought the attack was carried out by an angry mob responding to a video, made in the United States, that mocked Islam and the Prophet Mohammed. But the storming of the mission was later determined to have been a terrorist attack. Hide Caption 1 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Obama and Clinton stand at Andrews Air Force Base as the bodies of the four Americans killed are returned on September 14. Hide Caption 2 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A desk sits inside the burnt U.S. mission on September 13, two days after the attack. Hide Caption 3 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Damage is seen inside the U.S. mission on September 13. Hide Caption 4 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A lounge chair and umbrella float in the swimming pool of the U.S. mission on September 13. Hide Caption 5 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Demonstrators gather in Libya on September 12 to condemn the killers and voice support for the victims. Hide Caption 6 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – U.S. President Barack Obama, with Secretary of State Hillary Clinton on September 12, makes a statement at the White House about Stevens' death. Hide Caption 7 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A burnt vehicle is seen at the U.S. mission in Benghazi on September 12. Hide Caption 8 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – People inspect the damage on September 12. Hide Caption 9 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A small American flag is seen in the rubble on September 12. Hide Caption 10 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A man stands in part of a burned-out building of the U.S. mission on September 12. Hide Caption 11 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Smoke and fire damage is evident inside a building on September 12. Hide Caption 12 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Half-burnt debris and ash cover the floor of one of the U.S. mission buildings on September 12. Hide Caption 13 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – The U.S. mission is seen in flames on September 11, the day of the attack. Hide Caption 14 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A protester reacts as the U.S. mission burns on September 11. Hide Caption 15 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A vehicle and the surrounding area are engulfed in flames on September 11. Hide Caption 16 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Flames erupt outside of a building on September 11. Hide Caption 17 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A vehicle burns during the attack on the U.S. mission on September 11. Hide Caption 18 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Onlookers record the damage from the attack on September 11. Hide Caption 19 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Onlookers walk past a burning truck and building on September 11. Hide Caption 20 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A vehicle sits smoldering in flames on September 11. Hide Caption 21 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – People duck flames outside a building on September 11. Hide Caption 22 of 22

JUST WATCHED Possible security leak in Libya Replay More Videos ... MUST WATCH Possible security leak in Libya 02:59

JUST WATCHED U.S. Navy SEAL killed in Libyan attack Replay More Videos ... MUST WATCH U.S. Navy SEAL killed in Libyan attack 02:30

JUST WATCHED Suspects in Benghazi consulate attack Replay More Videos ... MUST WATCH Suspects in Benghazi consulate attack 02:08

JUST WATCHED Middle East unrest spikes Replay More Videos ... MUST WATCH Middle East unrest spikes 07:26

JUST WATCHED Does the U.S. need to up security abroad? Replay More Videos ... MUST WATCH Does the U.S. need to up security abroad? 02:26

Back at home in California, Woods worked as a registered nurse in his wife's dental practice in La Jolla, his mother told CNN affiliate KGW TV in Portland, Oregon, but he gained fulfillment in his military role.

"He loved the cutting edge. He loved danger. He loved an adrenaline rush," Bennett said.

"But he loved the thinking part of it, too. He was very street smart, and he was the guy you would want to have in your corner if you were in a tight situation."

A diplomatic source told CNN that Doherty was in Libya to search for shoulder-fired anti-aircraft missiles -- a mission given high priority after the fall of longtime Libyan strongman Moammar Gadhafi.

Doherty grew up in Massachusetts with a passion for the outdoors, particularly the mountain West, his family said. Outside the family's home in Woburn, near Boston, his sister remembered him as "our American hero."

"Glen lived his life to the fullest," Katie Quigley told reporters. "He was my brother, but if you ask his friends, he was their brother as well."

The 42-year-old graduated from high school in 1988 in neighboring Winchester, where flags were displayed at half-staff on Thursday. He played on the varsity tennis and wrestling teams, school officials said in an announcement marking his death. His junior-year English teacher, Judy Hession, recalled him as "bursting with life."

"Every day his huge smile and his happy-go-lucky optimism filled my classroom," Hession said in a statement released by the school district. "He got along with all types of people, was a class leader and, from the perspective of 30 years of teaching, one of my most memorable students."

After college in Arizona and stints as a "ski bum" and raft guide in Utah, Doherty joined the Navy and became a member of the elite Navy SEAL commandos in 1995, his family said in a statement.

"He told me he wanted to be a SEAL and I tried to use reverse psychology with him and say, 'Well, you won't make it. You can't make it. You don't pay attention to me -- never mind a superior officer,'" his father, Ben, told CNN affiliate WCVB in Boston. "He showed me."

Doherty had planned to leave the service after knee surgery in 2001, but after the al Qaeda attacks on New York and Washington, he "was not allowed to leave and didn't want to," his family said.

Doherty served two tours of duty in Iraq, starting with the U.S. invasion in 2003, before leaving the military in 2005. He then became a private security contractor, working in Afghanistan, Pakistan and Yemen -- a job that took a toll on his home life and contributed to a divorce, his family said.

He also joined the advisory board of the Military Religious Freedom Foundation, a group that has battled religious intolerance in the U.S. armed forces. Its president, former Air Force officer Michael "Mikey" Weinstein, said he was "in a state of shock" after learning of Doherty's death.

"He was one of our most active advisory board members," Weinstein said. "I was surprised he was willing to come on and lend the gravitas that comes with being a Navy SEAL to our cause." Doherty's involvement "made it easier for others to come to us," Weinstein added.

He said Doherty believed the kind of violent jihadists American troops faced were "a very small percentage of the overall mosaic of the Muslim faith," and saw anti-Muslim sentiment in the United States and in the ranks as something that hurt U.S. national security.

"He went back to the Middle East because he cared deeply about the Muslim people, and because he cared about bringing freedom and democracy and human rights to the Middle East," Weinstein said. Doherty "was a kind and caring person, and I'm sure that he gave every last bit of his courage and strength" to defend the consulate and Stevens, he added.

"All this is going to do is light a further fire under us in Glen's name and memory to continue to fight for religious freedom and respect and tolerance."

He also co-authored a 2010 book, "The 21st-Century Sniper: A Complete Practical Guide," with former comrade Brandon Webb. In a statement accompanying the family's, Webb said, "Don't feel sorry for him, he wouldn't have it."

"He died serving with men he respected, protecting the freedoms we enjoy as Americans and doing something he loved," Webb said.

In her statement, Clinton said Doherty, a paramedic, was referred to as "Bub" by his friends and family. "In the end, he died the way he lived -- with selfless honor and unstinting valor," she said.

Smith's death was among the first reported in the Benghazi fracas. Clinton eulogized him Wednesday as a 10-year veteran of the Foreign Service, an information management officer who had served in Iraq, South Africa, Canada and the Netherlands.

Smith was better known by his online alter ego, which was legendary in the gaming world.

In real life, he was an Air Force veteran with a wife, a son and a daughter. But in the virtual universe of the computer game EVE Online, Smith was "Vile Rat" -- one of the leaders of a gamers' alliance renowned for his diplomatic skill in the multi-player space warfare simulation.

"If you play this stupid game, you may not realize it, but you play in a galaxy created in large part by Vile Rat's talent as a diplomat. No one focused as relentlessly on using diplomacy as a strategic tool as VR," Smith's friend Alex Gianturco wrote in a tribute posted on his website.

Gianturco wrote that Smith had been under fire before, while posted to Baghdad. When that occurred, he usually broke off his messaging. "We'd freak out and he'd come back OK after a bit," Gianturco wrote. But Tuesday night, after reporting "GUNFIRE," Smith "disconnected and never returned," he added.

A few hours earlier, Smith had posted, "assuming we don't die tonight. We saw one of our 'police' that guard the compound taking pictures," he recounted.

The death of Stevens also left many across the United States and in foreign posts around the world reeling.

The U.S. ambassador died in the very city where he had arrived aboard a cargo ship in the spring of 2011 to help build ties between the upstart rebellion and the rebels.

Stevens graduated from the University of California, Berkeley, in 1982, then took a pause in his studies to join the Peace Corps. He later worked as an international trade lawyer in Washington before joining the Foreign Service, the career diplomatic corps, in 1991.

"When he went to Libya, he had no illusions about where he was going," said longtime friend Daniel Seidemann. "He has probably done more than anybody on the planet to help the Libyan people."

On Friday, in a ceremony marking the return of the four victims to the United States, President Barack Obama said that amid all of the horrific images coming out of Benghazi this week, "I also think of the Libyans who took to the streets with homemade signs expressing their gratitude to an American who believed in what we could achieve together.

"I think of the man in Benghazi with his sign in English, a message he wanted all of us to hear. It said, 'Chris Stevens was a friend to all Libyans.' Chris Stevens was a friend."