A U.S. Air Force B-52 Stratofortress aircraft from Barksdale Air Force Base, Louisiana, arrive at Al Udeid Air Base, Qatar, Saturday, April 9, 2016. The U.S. Air Force says it has deployed the bombers to take part in the U.S.-led bombing campaign against the Islamic State group. It is the first time the Cold War-era heavy bombers will be based in the region since the 1991 Gulf War, when they operated from neighboring Saudi Arabia. (Staff Sgt. Corey Hook/U.S. Air Force via AP)
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