An L-3 Communications Holdings Inc. maintainer preps a T-6A Texan II as fog covers the flightline at Vance Air Force Base, Okla., Nov. 4, 2016. Since 1960, Vance AFB has been a joint civilian-military team, training more than 20,000 U.S. and allied nation pilots. (U.S. Air Force photo/David Poe)