Airmen 1st Class Stephen Tapping and Kyle Brown, 28th Civil Engineer Squadron fire protection apprentices, perform bunker drills during a training exercise at Ellsworth Air Force Base, S.D., March 1, 2012. Bunker drills consist of donning fire safety gear as quickly as possible to ensure they are prepared at a moment’s notice for real-world emergencies. (U.S. Air Force photo by Airman Alystria Maurer/Released)