The smiling assassins: Teenage boys grin with delight as they prepare to murder five innocent men after ISIS militants asked for VOLUNTEERS to execute 'apostates'

The five captives, who had all been convicted of apostasy, were shot dead after the terror group led them into the middle of a crowd in Nineveh in Iraq and asked for volunteers to execute them. Before the execution, the teenage volunteers could be seen raising their hands, eager to be picked to carry out the shooting. And after being plucked from the crowd, several could not hide the joy on their faces at having being selected to carry out the brutal murders.