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)

U.S. Marine 1st Lt. Steve E. Anderson, a watch chief with 2nd Intelligence Battalion and British soldiers attend a class before beginning Exercise Phoenix Odyssey II in Edinburgh, U.K., Oct. 25, 2015. For the second consecutive year, both forces will conduct intelligence training and practice military skills in order to increase proficiency and build long lasting partnerships. (U.S. Marine Corps photo by Pfc. Erick Galera/Released) - U.S. Marine 1st Lt. Steve E. Anderson, a watch chief with 2nd Intelligence Battalion and British soldiers attend a class before beginning Exercise Phoenix Odyssey II in Edinburgh, U.K., Oct. 25, 2015. For the second consecutive year, both forces will conduct intelligence training and practice military skills in order to increase proficiency and build long lasting partnerships. (U.S. Marine Corps photo by Pfc. Erick Galera/Released)