U.S. Army cavalry scouts perform push up exercises during a portion of the Disciplus Validus (extreme physical training test) competition at Fort Benning, Ga., March 1-5, 2013. The five-day event tested 20 five-man teams on cavalry scout skills such as day and night fires, weapons familiarization, area reconnaissance, and observation post establishment. It also tested their physical endurance with multi-phased road marches, obstacle courses and a multi-event physical fitness test that included not only the standard push-ups and sit-ups but also pull ups, dips, bench press, rope climb, tire flip, and pushing a humvee up an incline. (Photo by Marvin Lynchard/Released)