Steven Sotloff

Film-maker-turned-revolutionary sends US veterans to train Christian militias in Iraq

Spokesman for Sotloff family says they want him ‘sentenced and sent prison’

US president rules out long ground war in request for limited action against extremists

Video carries threat to kill captives unless $200m ransom is paid within 72 hours

David Cameron pledges to use ‘all the assets we have’ to free hostages and defeat insurgents

Henning, 47, a taxi driver from Eccles, Greater Manchester, had been held captive in Syria for nine months

Hervé Gourdel slain ‘because he was French’, writes Lara Marlowe

Murder of David Haines condemned by Cameron as ‘act of pure evil’

Islamic State releases video footage of kidnapped British aid worker David Haines being killed

Extremists have threatened to behead kidnapped David Haines

Sharp change in tone from US president comes as public increasingly hawkish

US president to outline response to threat of radical fighters in Iraq and Syria

‘He was no war junkie ... He merely wanted to give voice to those who had none,’ says friend

Journalist killed by Islamic State militants hid second nationality during captivity

Journalist Steven Sotloff featured in video released last month of Jim Foley being killed