Obamas arrive at Buckingham Palace

Tags: USA, Politics, first, democrat, National, 10, president, Camilla, Charles, kate, Park, United, news, Edinburgh, Green, Duke, labour, Queen, World, states, liberal, Politicians, US, street, America, royal, American, Conservative, Palace, Obama, GUN, PM, lady, no, wills, NUMBER, mall, GUARD, william, RELATIONSHIP, david, cameron, State, ed, visit, special, philip, elizabeth, buckingham, KINGDOM, DEM, Minister, michelle, anthem, PRIME, nick, Honour, Tory, SALUTE, royalty, changing, essential, LIB, samantha, ten, Barack, Downing, Middleton, Clegg, Miliband, UK Politics, obamas, samcam