In this handout photo made available on April 28, 2014, provided by Estonia's military, a company of U.S. Army paratroopers arrive at Estonia's Amari air base as a part of America's effort to reassure its NATO allies in the Baltic region of its commitment to defense against Russia's aggression in Crimea and Ukraine. The paratroopers are based in the town of Paldiski, a former Soviet naval base, until the end of 2014, and will regularly drill and exercise with Estonian forces. (AP Photo/Estonian Defense Forces)
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