First-ever European TSP arrives in Bulgaria
U.S. Air Force Tech. Sgt. Christopher Lemley, 159th Expeditionary Fighter Squadron crew chief, examines the inside of an F-15 Eagle fighter aircraft engine on the flightline at Graf Ignatievo Air Base, Bulgaria, May 7, 2015. While in Bulgaria, the 159th EFS will conduct routine flying and training with the Bulgarian Air Force to enhance interoperability and support NATO security and stability. (U.S. Air Force photo by Senior Airman Gustavo Castillo/Released)