President Barack Obama disembarks Air Force One at MacDill Air Force Base, Fla, Sept. 16, 2014. The President will receive briefings from top commanders at U.S. Central Command, and thank the men and women who will partner with others in the region to carry out his strategy to degrade and defeat Islamic State of Iraq and the Levant. (U.S. Air Force photo by Senior Airman Shandresha Mitchell/ Released)