Prince William (rear), Catherine, Duchess of Cambridge (R) and Camilla, Duchess of Cornwall join Queen Elizabeth on board the Spirit of Chartwell for the Diamond Jubilee Pageant on the River Thames, in London June 3, 2012. Britain's Queen Elizabeth joined an armada of 1,000 boats in a gilded royal barge, in a pageant down the River Thames on Sunday in a spectacular highlight of four days of nationwide celebrations to mark her Diamond Jubilee. [Photo/Agencies]