Maj. Gen. Duane A. Gamble, commander, 21st Theater Sustainment Command since June 24, 2015, discusses building design plans with American and Estonian Soldiers during a tour of Tapa Army Base, Estonia, July 9, as part of Operation Atlantic Resolve. Gamble ensures 21st Theater Sustainment Command sets the United States European Command and as directed, the United States Africa Command theaters, employs warfighting functions to support unified land operations, deploys ready forces to execute theater opening, theater distribution, and sustainment, and supports U.S. Army Europe Theater Security Cooperation efforts. (U.S. Army photo by Spc. Jacqueline Dowland, 13th Public Affairs Detachment)