LONDON, UNITED KINGDOM – JUNE 30: General view of the Royal Canadian Air Force plane carrying Prince William, Duke of Cambridge & Catherine, Duchess of Cambridge at London’s Heathrow Airport on June 30, 2011 in London, England. The Duke and Duchess of Cambridge travel to Ottawa for their first overseas tour as a married couple, the 11 day tour will take them to Canada and then on to California. (Photo by Steve Parsons – WPA Pool/Getty Images)