Britain's Queen Elizabeth II arrives at Chelsea harbour to embark to join the Thames Diamond Jubilee Pageant on the River Thames in London on June 3, 2012. Queen Elizabeth II was to sail on a ceremonial barge down the Thames on Sunday at the centre of a 1,000-boat pageant to mark her diamond jubilee, although heavy rain threatened to spoil the party. AFP PHOTO / POOL / BETHANY CLARKE        (Photo credit should read Bethany Clarke/AFP/GettyImages)