A U.S. Army Ranger is monitored by Ranger Instructors while maneuvering between lanes at a grenade course while competing at the 31st Annual David E. Grange Jr. Best Ranger Competition, Fort Benning, Ga., April 11, 2014. The three-day competition consists of various challenging events, placing two-man teams in physically and mentally strenuous situations, ultimately testing their prowess based on a scoring system. (U.S. Army photo by Sgt. Daniel P. Shook/Released)