Final Challenge Marine Corps recruits participate in the final challenge of recruit training, known as the Crucible, at Marine Corps Recruit Depot Parris Island, S.C., June 14, 2019. SHARE IMAGE: Download Image: Full Size (1.56 MB) Tags: Marine Corps Photo By: Marine Corps Sgt. Dana Beesley VIRIN: 190614-M-XU431-0020C.JPG Photo Gallery