Surviving 'face-breaking' speed
Derek Hamby, the 50th Space Wing Manpower and Organization chief, goes for a lunchtime bicycle ride at Schriever Air Force Base, Colo., May 28, 2015. Six months after sustaining life-threatening injuries from a serious bicycling accident, Hamby is preparing for a 100-mile mountain bike race. (U.S. Air Force photo/Staff Sgt. Debbie Lockhart)