U.S. Marine recruits with Echo Company, 2nd Recruit Training Battalion Recruit Training Regiment, Marine Corps Recruit Depot Parris Island, climb the arm stretcher, an obstacle recruits must complete during the confidence course in phase one of recruit training aboard Marine Corps Recruit Depot Parris Island, S.C., Feb. 14, 2013. The confidence course is intended to test not only the recruit's physical performance, but their mental performance and the ability to use teamwork. (U.S. Marine Corps photo by Cpl. Aneshea S. Yee/Released)