Britain's Prince William (L), his wife Catherine, Duchess of Cambridge and Prince Harry board the Spirit of Chartwell for Queen Elizabeth's Diamond Jubilee River Pageant on the River Thames, in London June 3, 2012. 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]