Kevin Ohlfs, 28th Aircraft Maintenance Squadron sheet metal technician, secures safety wires on the wheel hub of a B-1 Bomber at Ellsworth Air Force Base, S.D., March 18, 2014. All B-1 aircraft are receiving updates to the brake system designed to increase the lifespan of B-1 tires by more than 500 percent. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/ Released)