CHRISTCHURCH, NEW ZEALAND - APRIL 14:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge place roses at a Memorial Wall as they Wigram Air Force Museum on April 14, 2014 in Christchurch, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge.  (Photo by Samir Hussein/WireImage)