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Sangar, an Iraqi Kurd who made the crossing a month after the sinking, lost several friends, including one from childhood.

He said "they tried to pull the wall down, and sangar".

Sangar Khaleel contributed reporting from Erbil.

Sangar Khaleel contributed reporting from Iraq.

He has claimed his hands were wet and his finger accidentally slipped on the trigger of a mounted machine gun he was manning inside a sangar.