BLACHFORD LAKE, NT - JULY 5:  Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge wear the sweaters of the Canadian Rangers after being made honourary members on July 5, 2011 in Blatchford Lake, Northwest Territories, Canada. The newly married Royal Couple are on the sixth 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/GettyImages)
BLACHFORD LAKE, NT - JULY 5:  Prince William, Duke of Cambridge (R) and Catherine, Duchess of Cambridge wear the sweaters of the Canadian Rangers after being made honourary members on July 5, 2011 in Blachford Lake, Canada. The newly married Royal Couple are on the sixth 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 Andy Clark-Pool/Getty Images)
BLACHFORD LAKE, NT - JULY 5:  Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge eat a lunch of Arctic Char with members of the Canadian Rangers (L) and Canadian Defence Minister Peter MacKay (C) and Health Minister Leona Aglukkaq (R) on July 5, 2011 in Blachford Lake, Canada. The newly married Royal Couple are on the sixth 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 Andy Clark-Pool/Getty Images)
BLACHFORD LAKE, NT - JULY 5: (NO UK SALES FOR 28 DAYS) Prince William, Duke of Cambridge and  Catherine, Duchess of Cambridge visit a Canadian Rangers station on July 5, 2011 in Blatchford Lake, Canada.   (Photo by Samir Hussein/WireImage)
BLACHFORD LAKE, NT - JULY 5: (NO UK SALES FOR 28 DAYS) Prince William, Duke of Cambridge and  Catherine, Duchess of Cambridge visit a Canadian Rangers station on July 5, 2011 in Blatchford Lake, Canada.   (Photo by Samir Hussein/WireImage)