Maj. Gen. Lawrence Wells (second from right) 9th Air Force commander, and Chief Master Sgt. James Davis (left) 9th Air Force command chief, learn about a hydrant mobile refueler, August 1, 2012, at Langley Air Force Base, Va. The general toured several Joint Base Langley-Eustis units and attended a military leadership review during his visit. (U.S. Air Force photo by Senior Airman John Strong/Released)