U.S. Air Force C-130J Super Hercules assigned to the 37th Airlift Squadron, Ramstein Air Base, Germany, conduct low level flight training during Operation Thracian Fall 2011, Oct. 18, 2011, in Plovdiv, Bulgaria. OTF11 is off-station training 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)