An A-10 Thunderbolt II attack aircraft is parked on the flightline May 4, 2015, at Ämari Air Base, Estonia. The A-10 supports Air Force missions around the world as part of the U.S. Air Force's current inventory of strike platforms, including the F-15E Strike Eagle and the F-16 Fighting Falcon fighter aircraft. (U.S. Air Force photo by Senior Airman Rusty Frank/Released)