William and Kate in Alberta

AP Photo/The Canadian Press/Jeff McIntosh

Prince William and his wife, Kate, the Duke and Duchess of Cambridge, greet well-wishers as they tour Slave Lake, Alberta, Canada, on Wednesday, July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William greets well-wishers at Slave Lake, Alberta, Canada, on Wednesday, July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Kate, Duchess of Cambridge greets people in Slave Lake, Alberta, Canada, on Wednesday, July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

AP Photo/The Canadian Press/Jonathan Hayward

Prince William is given a stuffed toy animal from someone in the crowd as he tours Slave Lake, Alberta, Canada, on Wednesday, July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Kate, Duchess of Cambridge greets people in Slave Lake, Alberta, Canada, on Wednesday, July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Britain's Prince William and his wife, Kate, Duchess of Cambridge, right, meet residents as they visit a fire-devastated town in Slave Lake, Alberta, Canada, on July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and Kate, the Duke and Duchess of Cambridge, visit a part of town devastated by a May 2011 fire on July 7, 2011, in Slave Lake, Alberta, Canada.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and his wife, Kate, the Duke and Duchess of Cambridge, look at a burned-out car in Slave Lake, Alberta, Canada, on July 6, 2011. The couple will meet rescue workers and families who lost everything in May's devastating wildfire.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and Kate, the Duke and Duchess of Cambridge, inspect a damaged car in a part of town devastated by a May 2011 fire on July 7, 2011, in Slave Lake, Alberta, Canada.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William, Duke of Cambridge and Kate, Duchess of Cambridge visit a part of town devastated by a fire in May 2011, on July 7, 2011 in Slave Lake, Alberta, Canada. The newly married Royal Couple are on the seventh day of their first joint overseas tour.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William, The Duke of Cambridge, surveys fire damage in Slave Lake, Alberta, Canada, on July 6, 2011.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and his wife, Kate, the Duke and Duchess of Cambridge, tour fire damage in Slave Lake, Alberta, Canada, on July 6, 2011. The couple will meet rescue workers and families who lost everything in May's devastating wildfire.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and his wife, Kate, the Duke and Duchess of Cambridge, tour Slave Lake, Alberta, Canada, on July 6, 2011. The couple will meet rescue workers and families who lost everything in May's devastating wildfire.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and his wife, Kate, the Duke and Duchess of Cambridge, arrive in Slave Lake, Alberta, Canada, July 6, 2011. The couple will meet rescue workers and families who lost everything in May's devastating wildfire.

Prince William and his wife, Kate, the Duke and Duchess of Cambridge, are greeted as they arrive in Slave Lake, Alberta, Canada, on July 6, 2011. The couple will meet rescue workers and families who lost everything in May's devastating wildfire.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour

Prince William and his wife, Kate, the Duke and Duchess of Cambridge arrive in Slave Lake, Alberta, Canada, on July 6, 2011. The couple will meet rescue workers and families who lost everything in May's devastating wildfire.

Pictures: Prince William and Kate visit Northwest Territories
Pictures: Newlyweds on Prince Edward Island
Pictures: William and Kate's Canada Day
Royal couple kicks off Canada tour