U.S. Marines with 2nd Intelligence Battalion and British soldiers search for a checkpoint during Exercise Phoenix Odyssey II near Edinburgh, U.K., Oct. 30, 2015. The service members executed a three-mile conditioning hike and shooting competition as part of the exercise, which is designed to enhance joint intelligence operations. (U.S. Marines Corps photo by Cpl. Lucas Hopkins/Released) - U.S. Marines with 2nd Intelligence Battalion and British soldiers search for a checkpoint during Exercise Phoenix Odyssey II near Edinburgh, U.K., Oct. 30, 2015. The service members executed a three-mile conditioning hike and shooting competition as part of the exercise, which is designed to enhance joint intelligence operations. (U.S. Marines Corps photo by Cpl. Lucas Hopkins/Released)