U.S. Air Force Senior Airman Keith Bates, crew chief with the 177th Fighter Wing of the New Jersey Air National Guard, marshals an F-16C Fighting Falcon prior to takeoff at Graf Ignatievo Air Base, Bulgaria, on July 13, 2015. The 177th FW is participating in Thracian Star, a bilateral training exercise to enhance interoperability with the Bulgarian air force and to bolster readiness to conduct combined air operations. (U.S. Air National Guard photo by Master Sgt. Andrew J. Moseley/Released)