KC-10 Extenders and C-17 Globemaster III's sit on the Ascension Auxiliary Airfield Ramp at Ascension Island in the Southern Atlantic Ocean, June 28, 2013.The normally tranquil island transformed into a major military aircraft hub during the month-long operation moving equipment and passengers to and from Africa in preparation for President Barack Obama’s official state visit to the African continent. (U.S. Air Force photo/Staff Sgt. Sean Baber)