With every day that passes, the pressure is mounting on Barack Obama to develop a coherent strategy that could lead to the defeat of the Islamic State.
Even at a news conference in the Estonian capital Tallinn today, the President managed to send out pretty mixed messages.
Yes, he described the objective as "degrading and destroying" IS, but he also spoke about managing the problem and of shrinking the influence of the militants.
Those are very different objectives, raising the question: is the White House trying to contain the problem or rather trying to crush the Islamic State?
Nonetheless, it seems likely that the US military will strike at some stage inside Syria. What is less clear is whether that will be a one-off, or rather the start of a military campaign that could last months or even years.
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.