KC-135 Stratotanker during sunset
A KC-135 Stratotanker sits on the flightline at MacDill Air Force Base, Fla., as the sun sets over St. Petersburg, Fla. on Jan. 12, 2015. The 16 KC-135 Stratotankers currently assigned to MacDill provide aerial refueling to nine combatant commands. (U.S. Air force photo by Airman 1st Class Mariette M. Adams)