Airmen from the 28th Bomb Wing form a line on the flightline during the wing’s Foreign Object Debris walk at Ellsworth Air Force Base, S.D., Aug. 18, 2014. Groups of Airmen walked the runway and taxiways to ensure the area was free from any debris that could cause damage to aircraft. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)