An aircraft sits on MacDill Air Force Base’s flightline awaiting the time it gets called for another mission, Oct 10, 2013, MacDill Air Force Base, Fla. MacDill's flightline is home to 16 KC-135 Stratotankers that provide aerial refueling support to Air Force, Navy, Marine Corps and allied nation aircraft. (U.S. Air Force photo/Staff Sgt. Brandon Shapiro)