BRISBANE, AUSTRALIA - APRIL 19:  Prince William, Duke of Cambridge inspects an honour Guard as he arrives at the Royal Australian Airforce Base at Amberley on April 19, 2014 in Brisbane, Australia. 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 Chris Jackson/Getty Images)