U.S. soldiers inspect the site where an Iranian missile hit at Ain al-Asad air base in Anbar province, Iraq January 13, 2020. U.S. military officers inspected the site of an Iranian missile attack on U.S. forces at an air base in Iraq on Monday (January 13 REUTERS/John Davison

Debris are seen at the site where an Iranian missile hit at Ain al-Asad air base in Anbar province, Iraq January 13, 2020. Iran launched 16 short-range ballistic missiles in the early hours of Wednesday morning (January 8), with at least 11 hitting Iraq's Ain al-Asad air base and one striking a facility in Erbil. REUTERS/John Davison

U.S. soldiers inspect the site where an Iranian missile hit at Ain al-Asad air base in Anbar province, Iraq January 13, 2020. U.S. President Donald Trump said no Americans were harmed in the strikes, which Iran said it launched in retaliation for the killing last week in Iraq of Iranian general Qassem Soleimani. REUTERS/John Davison

Debris and rubble are seen at the site where an Iranian missile hit at Ain al-Asad air base in Anbar province, Iraq January 13, 2020. REUTERS/John Davison

U.S. soldiers are seen at the site where an Iranian missile hit at Ain al-Asad air base in Anbar province, Iraq January 13, 2020. REUTERS/John Davison

U.S. soldiers inspect the site where an Iranian missile hit at Ain al-Asad air base in Anbar province, Iraq January 13, 2020. REUTERS/John Davison