140912-F-RP072-785
A Marine recruit winces in pain as a fellow recruit stands on her shoulders during the Crucible, Sept. 12, 2014, Parris Island, S.C. In the Crucible, the recruits face a 54-hour training exercise that validates the physical, mental, and moral training they have endured throughout recruit training. (U.S. Air Force photo by Staff Sgt. Jodi Martinez/Released)