CAMBRIDGE, UNITED KINGDOM - JULY 13: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince William, Duke of Cambridge kisses his grandmother Queen Elizabeth II goodbye after she opened the new East Anglian Air Ambulance base at Cambridge Airport on July 13, 2016 in Cambridge, England. (Photo by Max Mumby/Indigo/Getty Images)
