A Bulgarian air force MiG-21 Fishbed taxis at Graf Ignatievo Air Base, Bulgaria during Thracian Star on July 14, 2015. Airmen and F-16s from the 177th Fighter Wing of the New Jersey Air National Guard flew sorties with the Bulgarian air force at Thracian Star, a bilateral training exercise designed to enhance interoperability. (U.S. Air National Guard photo by Master Sgt. Andrew J. Moseley/Released)
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