CRUCIBLE TRAINING A U.S. Marine recruit awaits instruction while Defense Secretary Robert M. Gates observes The Crucible at Parris Island, S.C., May 13, 2011. The Crucible is the final test in recruit training, and represents the culmination of the skills and knowledge a Marine should possess. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 187452-H-ZZH77-528.jpg Photo Gallery