In this Sept. 23, 2014 photo released by the U.S. Air Force, a formation of U.S. Navy F-18E Super Hornets leaves after receiving fuel from a KC-135 Stratotanker over northern Iraq, as part of U.S. led coalition airstrikes on the Islamic State group and other targets in Syria. (AP Photo/U.S. Air Force, Staff Sgt. Shawn Nickel)
{}