OTTAWA, ON - JULY 1:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend Canada Day Celebrations at Parliament Hill on day 2 of the Royal Couple's North American Tour on July 1, 2011 in Ottawa, Canada. The newly married Royal Couple are on the second day of their first joint overseas tour. Ottawa is the start of a 12 day visit to North America which will take in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple will be joining millions of Canadians in taking part in today's Canada Day celebrations which mark Canada's 144th Birthday.
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