Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. Iraqi security forces fought Islamic State militants at the gates of the western city of Ramadi on Friday, and local authorities warned it was in danger of falling unless reinforcements arrived soon. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

A child is carried as displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

An Iraqi soldier carries a child as displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

A woman who fainted, is transported in a wheelbarrow by her brother as displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 17, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

A woman is transported in a wheelbarrow as displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, move past a member of the Iraqi security forces at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

A member of the Iraqi security forces stands guard as displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)

Displaced Sunni people, who fled the violence in the city of Ramadi, arrive at the outskirts of Baghdad, April 18, 2015. (Photo by Reuters/Stringer)