They were witnesses to one of the most shocking mass killings the world has seen.
But these moving images offer an exclusive look at how the survivors of the Anders Behring Breivik massacre have rebuilt their lives.
Breivik murdered 77 people on July 22, 2011, in Norway's worst peacetime atrocity. These photos from the One Day in History series reveal how some of the survivors are coping today, less than two years after the incident.
Cecilie Herlovsen, 17, from Sarpsborg, hid at the south end of the island with her best friend Andrine, who was killed. Cecilie was shot in her arm, shoulder and chin. The last bullet was stopped by her wisdom tooth. Her arm had to be amputated
When Anzor Djoukaev, 17, from Lillestrom, came out from his hiding place he was arrested by police and falsely accused of having a part in the massacre. He wasn't allowed to call his family and friends to let them know he was alive
Jorid Holstad Nordmelan, 21, from Namsos, hid under a bed in the school house throughout the entire massacre. She was rescued by police
Emilie Bersaas, 20, from Haugesund, hid under a bed in the school house for two hours until Breivik was caught and she was brought out by the police
Breivik first car-bombed a government building in Oslo, leaving eight dead and more than 200 injured.
He then made his way to a summer camp for Labour Youth members on Utoya, where he roamed the island with a gun, mowing down 69 and leaving more than 100 injured.
Last August, he was sent to Ila Prison near Oslo for pre-meditated murder and terrorism to serve a 21-year sentence, which can be extended if he is considered to remain a threat.
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The young people in the photographs are all survivors of the attack on the island of Utoya, where Breivik sparked terror as he began firing weapons indiscriminately. Those who managed to escape the initial hail of bullets fled, with some trying to get away by swimming across the lake.
Among the survivors is 17-year-old Cecilie Herlovsen, from Sarpsborg, who hid at the south end of the island with her best friend Andrine.
Cecilie was shot in her arm, her shoulder and chin. The last bullet was stopped by her wisdom tooth, which most likely saved her life. Her friend Andrine died, while Cecilie had to have her arm amputated due to her injuries.
Rescue effort: Search and rescue teams scoured the waters of the lake for survivors in the aftermath of the massacre on the island of Utoya in July 2011
Atrocity: Anders Breivik, seen left in court, fired indiscriminately on students at the summer camp on Utoya, where shell-shocked mourners lay flowers on the surface of the lake in the days after the mass shootings, right
On the scene in the hours after the attack on Utoya
Mohamad Hamed Hadi, 21, from Brumunddal, was in a coma for nearly two months after he was shot in the left shoulder, left leg and chest. He had to amputate his left leg and left arm
Torje Hanssen, 14, from Svalbard, was the youngest who attended AUF's summer camp in 2011. When his brother Viljar was shot, Torje started to swim, but because of the bullets he turned and dived. He was later rescued by a boat
Viljar Hanssen, 18, from Svalbard, was shot five times, in the head, left shoulder, left hand and thigh. He became blind in the right eye and had three fingers amputated
Adrian Pracon, 21, was shot in the shoulder. He survived by playing dead on the ground
Mubarak Haji Ahmed, 19, from Hamar hid in a cave below The Love Path before attempting to swim. He had to dive to escape the bullets. His older brother Khalid survived but his younger brother Isma was killed
Hanne Hesto Ness, 20, from Namsos, was shot in her arm, left little finger and in the neck. A vertebrae in her neck was shattered and her finger had to be amputated
'One week last summer' Tattoo on the arm of Hanne Hesto Ness who lost her little finger
Ina Libak, 21, from Baerum, was shot five times before being carried to the woods by seven young people who put rocks on top of the gunshot wounds to stop the bleeding, and laid close to her to keep her warm
Eirin Kristin Kjaer, 20, from Laksvatn in Balsfjord, hid in a cave with several others. Lying furthest out, she was shot in her stomach, arm, right knee and right armpit
Mathias Eckhoff, 21, from Skjetten, was shot in his groin, thigh and calf. His friend helped him swim away from the pump house where he was rescued by a boat
Mohamad Hamed Hadi, 21, from Brumunddal, had to have his left leg and arm amputated after he was shot in the shoulder, leg and chest at the pump house.
He was carried to a boat by his rescuers but spent nearly two months in a coma. Following the amputation Mohamad, who arrived in Norway as a refugee from Iraq, spent a total of eleven months in hospitals and rehabilitation centres.
For Anzor Djoukaev, 17, from Lillestrom, however it wasn't just the horror of the massacre he was forced to contend with.
When he came out from his hiding place under a piece of tarpaulin, he was arrested by the police and falsely accused of having a part in the massacre. He wasn't allowed to call his family and friends to let them know he was alive.
Torje Hanssen, 14, from Svalbard, was the youngest who attended AUF's summer camp in 2011. He hid below a track on Utoya known as The Love Path with his brother Viljar and some other young people.
When his brother was shot, Torje started to swim, but was forced to dive under the water after coming under a hail of bullets. He was later rescued by a boat.
His brother Vilkar, 18, was shot five times, in the head, left shoulder, left hand and thigh. He became blind in the right eye and had to have three fingers amputated.
In mid-October he returned home from rehabilitation. Viljar was elected to the council in Svalbard in autumn 2011.
Eirik Hoie Mortensen, 17, from Haugesund, hid by the shore where he swam out to save a friend from drowning. He was picked up by a boat and later sent to the hospital where he was treated for severe hypothermia
Best friends Victoria Froyd, 18, from Drammen, and Sofie Caroline Nilsen, 17, from Tonsberg, hid in the school building until the massacre was over
Prableen Kaur, 19, from Oslo hid by the pump house. She survived by laying completely still and pretending to be dead. She later swam away and was rescued by a boat
Tore Sinding Bekkedal, 24, hid in the bathroom of the cafe building. After ninety minutes the police rescued him
Sara Harborough Soma, 17, from Sandnes swam from the south peak with a friend. When they were 50 meters from the other shore, they were picked up by tourists in a rowboat
Some of the survivors were only able to survive the mass killing by pretending to already be dead.
Adrian Pracon, 21, managed to survive in this way after he was shot in the shoulder. And Mubarak Haji Ahmed, 19, from Hamar, hid in a cave below The Love Path before attempting to escape by swimming away.
When he was about 60 metres from the shore, he had to dive to escape the bullets. He was later picked up by a boat. His older brother Khalid survived but his younger brother Isma was killed.
Hanne Hesto Ness, 20, from Namsos, was shot in her arm, left little finger and in the neck. A vertebrae in her neck was shattered and she had to have her finger amputated. After four and a half months, Hanne was finally released from the hospital.
Ina Libak, 21, from Borum hid behind the piano in the cafe building. She was shot five times - in her hands, jaw and chest. After she was shot, she ran out and yelled: 'I've been shot! I've been shot! I'm going to die!'
She was carried into the woods by seven other young people who took care of her. They put rocks on top of the gunshot wounds to stop the bleeding, and laid close to her to keep her warm. The group then stayed in their hiding place for an hour and a half until Breivik was captured and they were rescued by a boat.
Norwegian photographer Andrea Gjestvang was awarded the L'Iris d'Or and named Photographer of the Year at the Sony World Photography Awards in London on Thursday for her portraits of the survivors, winning almost £17,000 ($25,000) in prize money.
Wearing a bullet-proof vest and yellow harness, Anders Breivik arrives with police on the island of Utoya for the first time since killing 69 people at the youth camp to reconstruct his actions
Aina Helgheim, 19, from Eidsvoll, hid in a rock cleft close to the shore along with three other girls until the shooting ended. They were rescued by boats
Ida Karoline Broholm, 21, from Hitra, hid in a room behind the kiosk before she moved down to the water front and swam away with a friend
Rustam Daudov, 17, from Elverum, hid by the pump-house before he found shelter in a small cave where he hid with a group of other youths until they were rescued by boats
Alexander Sandberg, 16, from Levanger, hid under a sofa in the school house. He was hiding there with 47 other adolescents until Breivik was arrested and the police came to the rescue
Eirin Kristin Kjaer, 20, from Laksvatn, in Balsfjord, hid in a cave with several others. As she was lying the furthest out of the cave, she was shot in her stomach, arm, right knee and right armpit.
Mathias Eckhoff, 21, from Skjetten, was shot in his groin, thigh and calf. His friend helped him swim away from the pump house and he was later picked up by a boat.
Iselin Rose Borch, 15, from Grong, was hiding behind a rock by the pump house on the island. She was rescued by tourists in a boat.
'In the period after Utoya I had a really hard time sleeping. I was afraid of the dark and suffered from dreadful nightmares. My mom and I decided that getting a dog might help me, so I got Athene. Now she sleeps on top of my stomach every night.'
Ylva Schwenke, 15, from Troms, was shot in the shoulder, her stomach and in both of her thighs. She said: 'I bear my scars with dignity, because I got them standing for something I believe in.'
A number of the survivors were able to hide throughout the entire massacre.
One such survivor was Jorid Holstad Nordmelan, 21, from Namsos, who hid under a bed in the school house. After two hours and five minutes, the police blasted through the windows and rescued him.
Marius Hoft, 18, from Hamar, hid on a rock shelf to avoid the shooting at Utoya
Eivind Rindalen, 23, from Tolga, took charge of a group of 11 youths. Attempting to escape in a rowing boat, they were shot at 200 meters from shore. None of the children were hurt
John Magne Pedersen Tangen, 19, from Loten, hid in a barn until the police came
Sebastian Johansen Pereau, 15, from Trondelag, escaped along with 11 other youths in a rowboat. They were shot at in the boat, but managed to lay low and nobody was injured. Sebastian's older brother Christian was killed on the island
Natia Chkhetiani, 23, from Kutaisi, Georgia, lost her best friend at Utoya. She later moved to Oslo to be a part of the national healing process
Best friends Victoria Froyd, 18, from Drammen, and Sofie Caroline Nilsen, 17, from Tonsberg, also hid in the school building until the massacre was over.
Hanne Linaker, 18, Iril Myrvang Gjorv, 17, and Ane Kollen Evenmo, 17, were among a group of five friends who travelled to the island from the arctic town of Bardu.
Only the three of them returned. Hanne lost her brother, while Ane was also shot.
Hakon Roals, 18, from Stavanger, hid under a cliff on the east side of the island. He swam away from the island and was rescued by a boat.
Cathrine Gjerdingen Larsen, 17, from Halden, meanwhile, hid at the south tip of Utoya. She swam away from the gunshots and was rescued by volunteers in a boat.
Marius Hoft, 18, from Hamar, hid on a rock shelf to avoid the shooting. His friend fell down and died during his attempt to climb down and reach Marius's hiding place.
Meanwhile, Ida Karoline Broholm, 21, from Hitra, hid in a room behind the kiosk before she moved down to the water front and swam away with a friend.
Aina Helgheim, 19, from Eidsvoll, hid in a rock cleft close to the shore along with three other girls until the shooting ended and they were rescued by boats.
Kjetil Lindstrom, 16, from Arendal, hid under a tree by 'the hill', before he finally ran down to shore and was rescued by Delta the Norwegian SWAT team.
Woria Kamil Ahmad, 18, from Hamar, hid by the pump-house. He survived by laying lifeless by the shore pretending to be dead
Kjetil Lindstrom, 16, from Arendal, hid under a tree by 'the hill', before he finally ran down to shore and was rescued by Delta
Hanne Linaker, 18, Iril Myrvang Gjorv, 17, and Ane Kollen Evenmo, 17, were with two other friends who had travelled to the island from the arctic town of Bardu. Only the three friends returned
Sara Harborough Soma, 17, from Sandnes, swam from the south peak with a friend. When they were 50 metres from the other shore, they were picked up by tourists in a rowboat.
Alexander Sandberg, 16, from Levanger, hid under a sofa in the school house. He was hiding there with 47 other adolescents until Breivik was arrested and the police came to the rescue.
Rustam Daudov, 17, from Elverum hid by the pump-house before he found shelter in a small cave where he hid with a group of other youths until they were rescued by boats.
Prableen Kaur, 19, from Oslo hid by the pump house. She survived by laying completely still and pretending to be dead. She later swam away and was rescued by a boat. Prableen is the youngest city council representative in Oslo and was selected with nearly 4,000 individual votes in the election of fall 2011.
Tore Sinding Bekkedal, 24, hid in the bathroom of the cafe building. After ninety minutes the police rescued him.
Hakon Roals, 18, from Stavanger hid under a cliff on the east side of the island. He swam away from the island and was rescued by a boat
Cathrine Gjerdingen Larsen, 17, from Halden, hid at the south tip of Utoya. She swam away from the gunshots and was rescued by volunteers in a boat
Tuva Elise Bo, 17, from Skjetten hid in the woods with her friend. After a while they moved into a bedroom in the cafeteria building, where they hid under the bed until the special forces came and rescued them. Tuva lost her best friend Sondre at Utoya
Borgar Brattas, 17, was hiding with another girl under a skate ramp through the entire massacre. Two hours later he was helped out by the police
Natia Chkhetiani, 23, from Kutaisi, Georgia, lost her best friend at Utoya. She later moved to Oslo to be a part of the national healing process.
Tuva Elise Bo, 17, from Skjetten hid in the woods with her friend. After a while they moved into a bedroom in the cafeteria building where they hid under the bed until the special forces came and evacuated them. Tuva lost her best friend Sondre at Utoya.
Eirik Hoie Mortensen, 17, from Haugesund, hid by the shore where he swam out to save a friend from drowning. He was picked up by a boat and later sent to the hospital where he was treated for severe hypothermia.
John Magne Pedersen Tangen, 19, from Loten, hid in a barn until the police came.
Eivind Rindalen, 23, from Tolga, took charge of a group of 11 youths. As they tried to escape in a rowing boat, they were shot at 200 meters from shore but fortunately not one of them was hurt.
Woria Kamil Ahmad, 18, from Hamar, hid by the pump-house. He survived by laying lifeless by the shore pretending to be dead. Emilie Bersaas, 20, from Haugesund, hid under a bed in the school house for two hours until Breivik was caught.
Sebastian Johansen Pereau, 15, from Trondelag escaped along with 11 other youths in a rowboat. About 200 meters from shore they were shot at, but they lay down inside the boat and no one were injured. His older brother Christian was killed on the island.
Borgar Brattas, 17, was hiding with another girl under a skate ramp through the entire massacre. Two hours later he was helped out by the police.
Ylva Schwenke, 15, from Troms, said: 'I bear my scars with dignity, because I got them standing for something I believe in'. She was shot in the shoulder, her stomach and in both of her thighs
Iselin Rose Borch, 15, from Grong, was hiding behind a rock by the pump house on the island. She was rescued by tourists in a boat. Her mother bought her a dog after the incident because she was afraid of the dark and had difficulty sleeping