Feature Marine Corps Pfc. Mason A. Davis, Charlie Company, 1st Recruit Training Battalion, lays a board across a chain bridge during the 12 Stalls event at Edson Range, Marine Corps Base Camp Pendleton, Calif., Sept. 23, 2015. The 12 Stalls event is a part of the Crucible, which is a 54-hour test of endurance where recruits must conquer more than 30 different obstacles while they experience food and sleep deprivation. U.S. Marine Corps photo by Cpl. Jericho Crutcher SHARE: Download: Full Size (0.93 MB) Tags: All images Credit: Cpl. Jericho Crutcher VIRIN: 150923-M-YZ063-013.JPG Photo Gallery