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U.S. Marines with the Combined Arms Company, Black Sea Rotational Force, Bulgarian and Romanian Forces conduct a joint exercise utilizing Bulgarian and U.S. main battle tanks, indirect fire, mechanized infantry, and close air support from U.S. Air Force assets during Platinum Lion 16-2 at Novo Selo Training Area, Bulgaria, Jan. 15, 2016. Exercise Platinum Lion increases readiness and demonstrates our collective ability to operate as a single force committed to protecting the sovereignty of NATO allies and other European partners. (U.S. Marine Corps Photo by Cpl. Justin T. Updegraff/Released)