U.S. Marines of 2nd Platoon, Charlie Company, 1st Battalion, 25th Marines, 4th Marine Division, Marine Forces Reserve hike to a designated training area in Burwash, Ontario, Canada, Feb. 13, 2015. Exercise Frozen Riley II was a multinational exercise between Canada and the United States military to promote interoperability and train for cold weather crisis response. (U.S. Marine Corps photo by Lance Cpl. Issac Velasquez/ released)