Britain's Prince William and his wife Catherine, Duchess of Cambridge, walk while visiting Blatchford Lake, Northwest Territories in Canada July 5, 2011.[Photo/Agencies]  

Catherine, the Duchess of Cambridge, changes into pants before departing with her husband, Britain's Prince William, on a sea plane for Blanchford Lake after visiting Yellowknife, Northwest Territories July 5, 2011.[Photo/Agencies]