Britain's Prince William (2/R) and his wife Catherine (2/L) are flanked by Chief of Air Force Air Marshall Geoff Brown (R) and Commanding Officer of Number 1 Squadron , Wing Commander Stephen Chappell (L) as they have their photo taken with members of 1 Squadron at RAAF Base Amberley, some 50kms outside Brisbane on April 19, 2014.  Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia.   AFP PHOTO/POOL/William WEST        (Photo credit should read WILLIAM WEST/AFP/Getty Images)