A group of top US officials including Secretary of State John Kerry and the Secretary of Defence, Chuck Hagel, will travel to the MIddle East to co-ordinate efforts against Islamic State.
The White House said the trip was aimed at building "a stronger rgional partnership against Islamic State".
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.