The Wall Street Journal’s Middle East correspondent Maria Abi-Habib tells Cathy Newman that her friend Peter Kassig became a pacifist after training as a US ranger, adding “he spent alot of time helping patch people up”.
Subscribe to Channel 4 News: http://bit.ly/1sF6pOJ
Isis and the new battle for Iraq: http://bit.ly/1t6o6sy
Top stories: http://bit.ly/1wdbIG1