Wyvern workouts
U.S. Air Force Tech. Sgt. Robert Pemberton, 31st Munitions Squadron armament support NCO in charge, and other bikers ride bicycles, May 19, 2015, at Aviano Air Base, Italy. Pemberton is the founder of the Aviano Cycling Club, one of many groups around base dedicated to fitness. (U.S. Air Force photo by Senior Airman Austin Harvill/Released)