A Marine with Alpha Company, 2nd Assault Amphibian Battalion, holds his post as his platoon prepares to ambush a notional enemy during Mountain Exercise 1-16, at Mountain Warfare Training Center in Bridgeport, California, Jan. 12, 2016. Marines with the unit took on the Mountain Warfare Course in preparation for Exercise Cold Response 16 in the near future. - A Marine with Alpha Company, 2nd Assault Amphibian Battalion, holds his post as his platoon prepares to ambush a notional enemy during Mountain Exercise 1-16, at Mountain Warfare Training Center in Bridgeport, California, Jan. 12, 2016. Marines with the unit took on the Mountain Warfare Course in preparation for Exercise Cold Response 16 in the near future.