A U.S. Army Soldier holds the U.S. flag during a closing

A U.S. Army Soldier holds the U.S. flag during a closing ceremony at Tapa Training Base, Estonia, June 21, 2016. U.S. forces in Europe participated in Saber Strike 16; a long-standing, U.S. Joint Chiefs of Staff-directed, U.S. Army Europe-led cooperative-training exercise, which has been conducted annually since 2010. This year’s exercise focused on promoting interoperability with allies and regional partners. The United States has enduring interests in supporting peace and prosperity in Europe and bolstering the strength and vitality of NATO, which is critical to global security. (U.S. Air Force photo/Senior Airman Nicole Keim)