The equation has changed for US foreign policy in Iraq because of the gravity of the humanitarian situation unfolding at Mount Sinjar.
President Obama, we all know, is a reluctant interventionist but with up to 40,000 internally displaced people huddled on a mountain top and surrounded by Isis militants threatening to slaughter them, obviously the moral pressure to act is immense.
One option is simply to drop food and supplies to them but it raises the question 'Is that sufficient?' given what might become of them. So then do ground troops become deployed in order to create some sort of humanitarian corridor? Does America decide to strike these militants to try to protect these tens of thousands of refugees?
You can see how very quickly America could get dragged back into the Iraq War, which of course it is deeply reluctant to do. But, on the other hand, doing nothing and being a spectator might simply not be tenable.
Kurdish Peshmerga fighters have emerged victorious in the battle for Mosul Dam, but the question is - what will their next move be?
An ITV News team at Mosul Dam was with victorious Kurdish Peshmerga fighters at the complex earlier today.
ITV News joined a Kurdish unit fighting Islamist militants near Irbil and found them using tanks from the 1950s and short on ammunition.