The family of captured Briton David Haines has told ITV News of their concern that any decision to join US airstrikes against Islamic State could harm his chances of survival.
Political Correspondent Carl Dinnen finds out more about the aid worker and "family man" currently at the mercy of the terror group.
I've been told at the Nato summit that the intelligence services know exactly who 'Jihadi John' is - or at least are 99.9% certain.
The British aid worker being held by Islamic State is David Haines, a 44-year-old father-of-two from Perth, Scotland.
In a video statement which claims to record his final words US hostage and journalist Steven Sotloff blames US foreign policy for his death.