The Old Guard Fife and Drum Corps perform during an official State Arrival ceremony for German Chancellor 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)