Extender Inspector Air Force Master Sgt. Greg L. Thomas performs a preflight inspection on a KC-10 Extender aircraft at Joint Base McGuire-Dix-Lakehurst, N.J., Feb. 15, 2018. Thomas is a flight engineer assigned to the 76th Air Refueling Squadron, 514th Air Mobility Wing. Air Force photo by Master Sgt. Mark C. Olsen SHARE: Download: Full Size (1.9 MB) Credit: Master Sgt. Mark Olsen VIRIN: 180215-F-AL508-0007A.JPG Photo Gallery