U.S. Air Force Senior Airman Christian Mirande, crew chief with the 177th Fighter Wing of the New Jersey Air National Guard, performs a strut servicing in conjunction with his basic post flight inspection on an F-16D Fighting Falcon at Graf Ignatievo Air Base, Bulgaria, on July 13, 2015. Mirande and approximately 150 airmen from the 177th FW are 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)