U.S. Air Force Senior Airman Paul A. Perez engineer, 78th Air Refueling Squadron, 514th Air Mobility Wing, performs a pre-flight check on a KC-10 Extender at Joint Base McGuire-Dix-Lakehurst, N.J., prior to an aerial refueling mission over the Atlantic Ocean July 15, 2017. The KC-10 is an Air Mobility Command advanced tanker and cargo aircraft designed to provide increased global mobility for U.S. Armed Forces and is assigned to the 305th Air Mobility Wing and is maintained and flown by the 514th Air Mobility Wing, Air Force Reserve Command and the 305th. (U.S. Air Force photo by Master Sgt. Mark C. Olsen/Released)