Amer Deghayes , 20 , is the eldest of four Brighton youths known to have gone to fight in Syria . He told CNN he had been inspired by European recruits taking up arms in Syria 's civil war . The youngest was just 13 when he left for Syria, and has not yet returned from fighting with ISIS or other jihadist groups in Iraq and Syria. A bereaved mother says it 's the responsibility of all to prevent young men traveling to war .
Amer Deghayes , 20 , is the eldest of four Brighton youths known to have gone to fight in Syria . He told CNN he had been inspired by European recruits taking up arms in Syria 's civil war . The British government says it will crack down on what it calls the `` flow of foreign fighters '' A bereaved mother says it 's the responsibility of all to prevent young men traveling to war .