C-130J aircraft from the 37th Airlift Squadron, Ramstein Air Base, Germany, fly over Plovdiv, Bulgaria, during Exercise Thracian Fall 2011, Oct. 17, 2011. Thracian Fall is an off-station training exercise designed to enhance interoperability between U.S. and Bulgarian Air Forces as well as build partnerships with paratroopers from both. (U.S. Air Force photo/Senior Airman Stephen J. Otero)