Marines prepare for a reconnaissance patrol during exercise Riley Xanten II in Burwash, Ontario, Feb. 4, 2017. During the exercise, the Marines used their cold weather gear and knowledge gained from their Canadian counterparts to hike through rough terrain, construct debris shelters, build fires more efficiently and procure food from ice fishing. The Marines are assigned to Charlie Company, 1st Battalion, 25th Marine Regiment. Marine Corps photo by Sgt. Sara Graham