U.S. military personnel form up during an official State Arrival ceremony for German Chancelor Angela Merkel on the South Lawn at the White House in Washington June 7, 2011. U.S. President Barack Obama and Merkel will air their differences over fiscal policy, the Eurozone crisis, and the war in Libya during the German leader’s state visit on Tuesday. REUTERS/Jonathan Ernst (UNITED STATES – Tags: POLITICS MILITARY)