As a photographer and activist, Abd Alkader Habak bears witness to the horrors of the conflict in Syria.
But when a evacuating civilians from besieged areas at a checkpoint near Aleppo last week, killing 112 people, including 68 children, he could not stand by and continue taking photos.
Mr Habak was there when it happened and was briefly knocked out by the blast. When he came to he could couldn't believe what he saw all around him.
"The scene was horrible, especially seeing children wailing and dying in front of you," Mr Habak told.
"So I decided along with my colleagues that we'd put our cameras aside and start rescuing injured people."Among the many children killed by the explosion he noticed an injured young boy, bleeding but still alive and in need of help.
Abd Alkader Habak carries a child away from the bomb blast. Source: Twitter
"So I picked him up and started to run towards the ambulance. I don't know what happened to the child, but I put him in an ambulance and they took him to one of the hospitals inside the rebel-held area."
Mr Habak kept his camera on and took some photos as he helped the injured so he could record the scenes of devastation. Another photographer, Muhammad Alrageb, captured Mr Habak's heroic efforts.
"I wanted to film everything to make sure there was accountability," Mr Habak told CNN.
At one point, the sight of so many people killed in the attack became too much for Habak, who fell to his knees and sobbed beside the body of a children.
"I was overcome with emotion," Mr Habak told CNN. "What I and my colleagues witnessed is indescribable."
Six years of war in Syria