U.S. Marine Corps Cpl. Immanuel Friddle, guide for Combat Logistics Battalion 252, prepares fellow Marines for a hike in Bridgeport, California, during Mountain Exercise 1-16, a cold weather training exercise, on Jan. 11, 2016. The training is a prerequisite for a large, multi-national exercise called Cold Response 16 that will take place in Norway, March of this year. Cold Response will challenge 12 NATO allies' and partners' abilities to work together and respond in the case of a crisis. (U.S. Marine Corps photo by Lance Cpl. Brianna Gaudi)