PRAGUE, CZECH REPUBLIC - MARCH 30:  U.S. soldiers of the 3rd Squadron, 2nd Cavalry Regiment of the US Army arrive to Czech army barracks on March 30, 2015 in Prague, Czech Republic. U.S. soldiers are travelling in the 'Dragoon Ride' convoy from Estonia to their home base in Vilseck, Bavaria, Germany. The soldiers have been taking part in an Atlantic Resolve exercises in the Baltic countries, designed to show that NATO is prepared to defend its members and launched last year in response to Russia's aggression in the Ukraine.  (Photo by Matej Divizna/Getty Images)