U.S. Marines with 2nd Battalion, 6th Marines, prepare to load a CH-53 Sea Stallion at the U.S. Marine Corps Mountain Warfare Training Center (MWTC) Bridgeport, Calif., Feb. 3, 2015. MWTC trains Marines across the warfighting functions for operations in mountainous, high altitude, and cold weather environments in order to enhance a unit's ability to shoot, move, communicate, sustain, and survive in mountainous regions of the world. (U.S. Marine Corps photo by Sgt. Anthony L. Ortiz/Released)