Capt. Oneff Reyes (foreground) and Maj. Rich Polehemus, with the 326th Airlift Squadron, Dover Air Force Base, Del., participate in a C-17A Globemaster III training mission, which involved mid-air refueling exercises, June 18, 2013. Dover AFB's fleet of C-5M and C-17As are shared by the regular Air Force's 436th Airlift Wing and the Air Force Reserve's 512th AW. (U.S. Air Force photo/Greg L. Davis)