FAIRFORD, UNITED KINGDOM - JULY 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Prince George of Cambridge visit the Royal International Air Tattoo at RAF Fairford on July 8, 2016 in Fairford, England. (Photo by Max Mumby/Indigo/Getty Images)

FAIRFORD, UNITED KINGDOM - JULY 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Prince George of Cambridge visit the Royal International Air Tattoo at RAF Fairford on July 8, 2016 in Fairford, England. (Photo by Max Mumby/Indigo/Getty Images)