Chief Petty Officer John K. Maury, senior enlisted officer, Mountain Medicine Program, Marine Corps Mountain Warfare Training Center, native of Macauley Hill, Calif., uses his ski poles to exit the freezing water during an Ice-Breaker Drill at Levitt Lake, MCMWTC, Bridgeport, Calif., Jan. 30, 2015. The six week course, which began Jan. 5 and is scheduled to end Feb. 18., is designed to train Marines on what to expect in a cold weather environment. (Official Marine Corps photo by Lance Cpl. Medina Ayala-Lo/Released)