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STAMFORD, ENGLAND - FEBRUARY 14: Catherine, Duchess of Cambridge during a visit to the RAF Air Cadets at RAF Wittering on February 14, 2017 in Stamford, England. The Duchess of Cambridge is Royal Patron and Honorary Air Commandant of the Air Cadet Organisation. (Photo by Mark Cuthbert/UK Press via Getty Images)

STAMFORD, ENGLAND - FEBRUARY 14:  Catherine, Duchess of Cambridge during a visit to the RAF Air Cadets at RAF Wittering on February 14, 2017 in Stamford, England. The Duchess of Cambridge is Royal Patron and Honorary Air Commandant of the Air Cadet Organisation.  (Photo by Mark Cuthbert/UK Press via Getty Images)