CHARLOTTETOWN, PE - JULY 04:  Catherine, Duchess of Cambridge wave as Prince William, Duke of Cambridge takes part in helicopter manouvres called 'water birding' across Dalvay lake on July 4, 2011 in Charlottetown, Canada. The newly married Royal Couple are on the fifth day of their first joint overseas tour. The 12 day visit to North America is taking in some of the more remote areas of the country such as Prince Edward Island, Yellowknife and Calgary. The Royal couple started off their tour by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday.  (Photo by Arthur Edwards - Pool/Getty Images)