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U.S. Army Lt. Col. L. Andrew Zartman, the commanding officer the 1st Squadron, 152nd Cavalry Regiment, 76th Infantry Brigade Combat Team, 38th Infantry Division, Indiana Army National Guard, gestures toward a battle map while speaking with U.S. Ambassador Bridget Brink, the ambassador to Slovakia, at Lest military training center, Slovakia, Nov. 8, 2019. (U.S. Army photo)

U.S. Department of State

The Lessons of 1989: Freedom and Our Future