Final check, US Air Force Photo

A KC-135R Stratotanker with the 108th Wing, New Jersey Air National Guard, waits for a final check before all the hatches are closed on the flight line at Joint Base McGuire-Dix-Lakehurst, N.J., Dec. 12, 2015. The Stratotanker provides the core aerial refueling capability for the United States Air Force. The aircraft, which enhances the Air Force's capability to accomplish its primary mission of Global Reach and Global Power, also provides aerial refueling support to Air Force, Navy, Marine Corps and allied nation aircraft. The KC-135R is also capable of transporting litter and ambulatory patients using patient support pallets during aeromedical evacuations. (U.S. Air National Guard photo by Master Sgt. Mark C. Olsen/Released)