Ski Trials Marines ski to an avalanche prone hill during a winter mountain engineering course at the Marine Corps Mountain Warfare Training Center, Bridgeport, Calif., Feb. 8, 2023. The course teaches students how to use demolition to create holes in iced-over lakes and trigger avalanches. SHARE: Download: Full Size (4.86 MB) Tags: marine corps Credit: Marine Corps Cpl. Andrew Bray VIRIN: 230208-M-MY519-1061A.JPG Photo Gallery