LONDON, UNITED KINGDOM - DECEMBER 16: Cadet Sergeant Tommy Dade (far left) and Cadet Sergeant Bronwyn Jacobs (far right) stand with the Duke of Edinburgh (second right) as he meets Air Commodore, Dawn McCafferty, Commandant of the Air Cadet organisation (centre) on December 16, 2015 in London, England. The Duke retired from the post of Air Commodore in Chief while the Duchess of Cambridge (second left) became Honorary Air Commandant of the Air Cadets. (Photo by Stefan Rousseau /WPA Pool / Getty Images)