An Estonian Soldiers defends his position during Operation

An Estonian Soldiers defends his position during Operation Siil, May 11, outside of Kiikla, Estonia. Operation Siil, also known as Hedgehog, is the largest training exercise ever held in Estonia and features more than 12,000 Soldiers from six nations. Operation Siil, part of Operation Atlantic Resolve, is a way for the United States and NATO forces to unite, train, build relationships, trust, and enhance interoperability. (U.S. Army Photo by Sgt. 1st Class Joshua S. Brandenburg, 13th Public Affairs Detachment)