Hundreds of civilians flee villages outside Mosul the day after Iraqi Kurdish forces launch an operation east of Islamic State-held Mosul on Monday, August 15, 2016. The Kurdish forces known as the Peshmerga say they have retaken 12 villages in the operation in an effort to encircle the city. (Photo by Susannah George/AP Photo)





Lt. Col. Arshad Hussein with the 1st Zerevani Brigade at a small outpost outside the village of Qarqashah, Iraq in Monday, August 15, 2016. (Photo by Susannah George/AP Photo)





In this photo taken on Monday, Aug. 15, 2016, A Russian Tu-22M3 bomber stands on the tarmac at an air base near Hamedan, Iran. Russian warplanes took off on Tuesday August 16, from Iran to target Islamic State fighters and other militants in Syria, widening Moscow's bombing campaign in Syria.(Photo by WarfareWW Photo via AP Photo)





In this photo taken on Monday, Aug. 15, 2016, a Russian Tu-22M3 bomber stands on the tarmac while another plane lands at an air base near Hamedan, Iran. Russian warplanes took off on Tuesday August 16, from Iran to target Islamic State fighters and other militants in Syria, widening Moscow's bombing campaign in Syria.(Photo by WarfareWW Photo via AP Photo)





Kurdish Peshmerga forces fire a rocket toward Islamic State militants on the southeast of Mosul , Iraq, August 14, 2016. (Photo by Azad Lashkari/Reuters)





Smoke rises from clashes with Islamic State militants on the outskirt of Al Qayyarah, Iraq, August 14, 2016. (Photo by Reuters/Stringer)





Smoke rises from clashes with Islamic State militants on the outskirt of Al Qayyarah, Iraq, August 14, 2016. (Photo by Reuters/Stringer)





A displaced woman, who fled Islamic State violence, is seen on the outskirt of Al Qayyarah, Iraq, August 14, 2016. (Photo by Reuters/Stringer)





Displaced people, who fled Islamic State violence, are seen on the outskirt of Al Qayyarah, Iraq, August 14, 2016. (Photo by Reuters/Stringer)





Displaced people, who fled Islamic State violence, arrive on the outskirt of Al Qayyarah, Iraq, August 14, 2016. (Photo by Reuters/Stringer)





Smoke rises from clashes with Islamic State militants on the outskirt of Al Qayyarah, Iraq, August 14, 2016. (Photo by Reuters/Stringer)





Yemeni army soldiers ride on trucks as they escort Yemen's Vice President Ali Muhssien al-Ahmar (not pictured) at a military barracks in the country's central province of Marib August 15, 2016. (Photo by Reuters/Stringer)





Libyan forces allied with the U.N.-backed government fire a shell at Islamic State fighters' positions in Sirte, Libya August 15, 2016. (Photo by Ismail Zitouny/Reuters)





Libyan forces allied with the U.N.-backed government fire a shell at Islamic State fighters' positions in Sirte, Libya August 15, 2016. (Photo by Ismail Zitouny/Reuters)





A fighter of Libyan forces allied with the U.N.-backed government looks through a pair of binoculars during a battle with Islamic State fighters in Sirte, Libya August 15, 2016. (Photo by Ismail Zitouny/Reuters)





A fighter of Libyan forces allied with the U.N.-backed government holds his weapon as he patrols during a battle with Islamic State fighters in Sirte, Libya August 15, 2016. (Photo by Ismail Zitouny/Reuters)





Fighters of Libyan forces allied with the U.N.-backed government take up position during a battle with Islamic State fighters in Sirte, Libya August 15, 2016. (Photo by Ismail Zitouny/Reuters)





Libyan forces allied with the U.N.-backed government fire an artillery cannon at Islamic State fighters' positions in Sirte, Libya August 15, 2016. (Photo by Ismail Zitouny/Reuters)





Iraqi security forces gather on the outskirt of Al Qayyarah, Iraq, August 15, 2016. (Photo by Reuters/Stringer)





Smoke rises from clashes between Iraqi security forces and Islamic State militants as seen through a window of a military vehicle on the outskirt of Al Qayyarah, Iraq, August 15, 2016. (Photo by Reuters/Stringer)





Smoke rises during a battle between Libyan forces allied with the U.N.-backed government and Islamic State fighters in neighborhood Number Two in Sirte, Libya August 16, 2016. (Photo by Ismail Zitouny/Reuters)