U.S., Bulgarian Airmen partner to control skies
GRAF IGNATIEVO AIR FORCE BASE, Bulgaria -- Bulgarian and U.S. Air Force air traffic controllers keep in constant contact with the pilots of F-16 Fighting Falcons on approach during Operation Thracian Star Oct. 12. The operation was a three-week combined exercise that gave both U.S. and Bulgarian Airmen the opportunity to train together and strengthen relationships (U.S. Air Force photo/Staff Sgt. Benjamin Wilson)