Marines conclude a battalion-level live-fire exercise with the Norwegian army to improve their ability to operate in mountainous and extreme cold weather environments in Setermoen, Norway, Nov. 17, 2016. The Black Sea Rotational Force is an annual multilateral security cooperation activity between the U.S. Marine Corps and partner nations in the Black Sea, Balkan and Caucasus regions designed to enhance participants’ collective professional military capacity, promote regional stability and build enduring relationships with partner nations. Marine Corps photo by Sgt. Michelle Reif