American soldiers clearing rubble at Ain al-Asad air base in the Iraqi province of Anbar on Jan. 13, 2020. Iran launched a wave of missiles at the sprawling base in western Iraq and a base in Erbil, the capital of Iraq's Kurdish region, in retaliation for the U.S. killing top Iranian Gen. Qassem Soleimani in a drone strike in Baghdad on Jan. 3.