The United States has reluctantly re-entered the Iraq war.
President Obama says the military action is to protect fleeing Christians and other religious minorities threatened with potential genocide.
Tens of thousands of people are trapped in the Sinjar mountains in the north of the country.
ITV News Washington Correspondent Robert Moore reports:
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.