The terror of the ordeal she -- and so many like her -- had endured was imprinted on the face of a young girl dressed in purple, as she sat opposite me on a mercy dash away from Mount Sinjar.

Aziza Hamad, then 14, was one of more than 30 desperate civilians who made a mad scramble to get onto an Iraqi military helicopter -- with a CNN team on board -- in August 2014. Their dramatic journey was captured on camera

Thousands of civilians from Iraq's Yazidi religious minority had fled to higher ground to escape the murderous advance of ISIS militants.

Families like Aziza's had spent more than a week trapped on the barren heights of Mount Sinjar, under siege by the fighters, and with little access to food or water.

The helicopter that hovered briefly overhead offered them a vital chance of escape; missing it could have meant their family was separated, perhaps forever.

Fortunately for the Hamads, Aziza and eight of her relatives managed to clamber on board, crouching for shelter, clinging together for comfort and crying as the Iraqi air crew opened fire with machine guns on suspected ISIS targets during their flight to safety.

More than a year after their chaotic escape, CNN tracked down Aziza and her family to the refugee camp in Iraqi Kurdistan where they now live.

Photos: Yazidi girl recalls helicopter escape from ISIS Photos: Yazidi girl recalls helicopter escape from ISIS Aziza Hamad, 14, talks to her mother minutes after being rescued from Mount Sinjar in Iraq on August 14, 2014. A year after she and other Yazidi Iraqis were saved from the murderous advance of ISIS, CNN's Ivan Watson tracked Aziza down. Hide Caption 1 of 7 Photos: Yazidi girl recalls helicopter escape from ISIS Back in 2014, Aziza and eight members of her family, including her older sister and their father, managed to scramble aboard an Iraqi military helicopter, clinging together for comfort and crying as the crew opened fire on suspected ISIS targets below. Hide Caption 2 of 7 Photos: Yazidi girl recalls helicopter escape from ISIS A year on, Aziza, now 15, and most of her family are living in a refugee camp in Iraqi Kurdistan. Two of her brothers are missing, presumed to have been captured by ISIS. A third brother has made it to Germany, where he is studying and working in a factory. Hide Caption 3 of 7 Photos: Yazidi girl recalls helicopter escape from ISIS Aziza's young niece, Helen, was also among those rescued in 2014. Hide Caption 4 of 7 Photos: Yazidi girl recalls helicopter escape from ISIS A year on, Helen poses for a photo with her father, Aziza's brother Thabit, in the refugee camp that they now call home. Aziza and Thabit's father's physical and mental health has deteriorated, leaving Thabit to bear much of the responsibility for the family. Hide Caption 5 of 7 Photos: Yazidi girl recalls helicopter escape from ISIS Aziza's family poses for a photo in 2014. For several months, they had little choice but to squat amid the bare concrete in an unfinished construction site, using cardboard and plastic sheeting for shelter. Hide Caption 6 of 7 Photos: Yazidi girl recalls helicopter escape from ISIS A year on, they are living in a refugee camp in the Kurdish region of Iraq. CNN showed them footage of their harrowing 2014 helicopter escape, which left several members of the family in tears. Hide Caption 7 of 7

"The year passed and we're all safe, thank god," says Dunya, Aziza's 18-year-old sister. "But if we went home it would be better."

The pre-fabricated, two-room containers that the Hamad family now calls home are a dramatic improvement from the conditions they were living in not long ago.

For the first seven months after their escape, the family had little choice but to squat amid the bare concrete in an unfinished construction site.

"We used cardboard and plastic sheets for shelter," Aziza recalls. "There was a lot of smoke ... because we didn't have gas for heat and there wasn't enough electricity. In the camp it's much better."

Aziza and Dunya had smiled broadly as we arrived to visit them, but it did not take long for the trauma of their past year to surface.

In the middle of a conversation, Aziza's eyes suddenly well up with tears. "When I see you," she explains, "I remember what happened."

In the year since they fled their home, the mental and physical health of Aziza and Dunya's father has deteriorated significantly. He is no longer able to walk.

During our hour-long meeting with the family, he sits and stares silently at a wall; the only time he engages with others is at the mention of his two adult sons, Fahed and Wahed.

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The two men are believed to have been captured by ISIS back in August 2014. They haven't been heard from since.

"We don't have time to think about the future right now," says Dunya. "All we're thinking about now is when my dad will stand up on his feet again, and when my two brothers will return to us."

A third brother, Karem, 23, left Iraq shortly after the family's flight from Mount Sinjar to follow the migrant trail from Turkey into Europe, paying traffickers to help smuggle him across dangerous seas and international borders.

The journey cost his family thousands of dollars and took months, but he made it to safety eventually; Karem now lives in Hanover, Germany.

In a video call with CNN, he explains that he spends his days in school learning German, before working for several hours a night on an assembly line in a factory.

Asked whether he misses Iraq and his family home in Sinjar, Karem does not hesitate: "No, that's gone for me. I lost Iraq and Sinjar."

Instead, he explains: "I want to build something for myself and my future. I wasn't able to do anything in Iraq. I'm not going to let this opportunity go away."

Much of the responsibility for leading the Hamad clan now falls on the shoulders of another brother, Thabit, who has a wife and three small children of his own to care for.

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Squinting from beneath a blue baseball cap, he says he is grateful to have found work as a car mechanic in a town just outside the refugee camp.

But he admits he has little hope of moving the family back to their house in Sinjar any time soon.

"Even if the Peshmerga liberate Sinjar," he says, referring to the Kurdish military forces, "our return would be very difficult because there is no electricity, no running water and no services there.

"I think we're going to stay here for at least a year."

The Hamad family are one of many.

The Kurdistan regional government says some 400,000 Yazidis were forced from their homes by the ISIS offensive in 2014. They have sought refuge in the Kurdish enclave, which has taken in a total of 1.5 million displaced Iraqis, including members of the Assyrian and Chaldean Christian minorities as well as Muslims. In addition, Kurdish officials say roughly 300,000 Syrian refugees have fled to northern Iraq.

Despite the competing demands on his time, Thabit takes a moment to watch CNN's footage of his family's flight from Mount Sinjar on board the helicopter. The images -- and the memories they spark -- leave him weeping.

"I just want to start a new life," Thabit explains, wiping away tears. "And I want my family to stay safe and to stay together."

Aziza is now 15 and a little taller than her older sister. More than a year after her family's escape, she is still haunted by the past.

One of the few times she truly looked happy during our conversation was when asked what she would like to do to the men from ISIS who attacked her family.

"I would stomp on their heads and kill them," she said with a smile, repeating insistently: "I would stomp on their heads and kill them."