U.S. Marine Corps M1 Abrams tanks and Norwegian Leopard 2A4 Tanks rest in a field after training in Rena, Norway, Feb. 17,2016. The Marines and Norwegian Army are working together as part of Exercise Cold Response, a joint NATO and allied country exercise comprised of 12 countries and approximately 16,000 troops. The U.S. European Command appreciates the opportunity for taking part in such a large multinational exercise at the invitation of our Norwegian Allies; and we are especially thankful for the chance to put our skills to the test in unique cold weather conditions. (U.S. Marine Corps photo by Master Sgt. Chad McMeen/Released) - U.S. Marine Corps M1 Abrams tanks and Norwegian Leopard 2A4 Tanks rest in a field after training in Rena, Norway, Feb. 17,2016. The Marines and Norwegian Army are working together as part of Exercise Cold Response, a joint NATO and allied country exercise comprised of 12 countries and approximately 16,000 troops. The U.S. European Command appreciates the opportunity for taking part in such a large multinational exercise at the invitation of our Norwegian Allies; and we are especially thankful for the chance to put our skills to the test in unique cold weather conditions. (U.S. Marine Corps photo by Master Sgt. Chad McMeen/Released)