Students and instructors with Winter Mountain Engineer Course, watch as explosives placed in an iced over lake detonate at Marine Corps Mountain Warfare Training Center (MCMWTC), Bridgeport, California, Feb. 7, 2023. As part of the Winter Mountain Engineer Course, students learned how to use demolition to create holes in iced over lakes and trigger avalanches. ( Marine Corps photo by Cpl. Andrew Bray)

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Keywords: cord, det, explosion, ice, mwtc, usmc