The Bulgarian and United States flags wave on flagpoles outside the Bulgarian air force 3rd Air Force Base headquarters at Graf Ignatievo, Bulgaria, March 16, 2016. The Bulgarians hosted the U.S. Air Force’s 74th Expeditionary Fighter Squadron which completed a six-month deployment to Eastern Europe March 18, 2016, in support of Operation Atlantic Resolve. (U.S. Air Force photo by Staff Sgt. Joe W. McFadden/Released)