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AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwallarrives at RAF Halton in Aylesbury for a graduation parade and to present the station with its new Queen's Colour during a visit to RAF Halton on May 24, 2017 in Aylesbury, England. (Photo by Andrew Matthews - WPA Pool/Getty Images)

AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwallarrives at RAF Halton in Aylesbury for a graduation parade and to present the station with its new Queen's Colour during a visit to RAF Halton on May 24, 2017 in Aylesbury, England.  (Photo by Andrew Matthews - WPA Pool/Getty Images)

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AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall arrives at RAF Halton for a graduation parade and to present the station with its new Queen's Colour on May 24, 2017 in Aylesbury, England. (Photo by Andrew Matthews - WPA Pool/Getty Images)

AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall arrives at RAF Halton for a graduation parade and to present the station with its new Queen's Colour on May 24, 2017 in Aylesbury, England.  (Photo by Andrew Matthews - WPA Pool/Getty Images)

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AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall presents the station with its new Queen's Colour at RAF Halton on May 24, 2017 in Aylesbury, England. (Photo by Andrew Matthews - WPA Pool/Getty Images)

AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall presents the station with its new Queen's Colour at RAF Halton on May 24, 2017 in Aylesbury, England.  (Photo by Andrew Matthews - WPA Pool/Getty Images)

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AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall throws a paper plane with school children from Halton Community Combined School during a visit to RAF Halton on May 24, 2017 in Aylesbury, England. (Photo by Andrew Matthews - WPA Pool/Getty Images)

AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall  throws a paper plane with school children from Halton Community Combined School during a visit to RAF Halton on May 24, 2017 in Aylesbury, England.  (Photo by Andrew Matthews - WPA Pool/Getty Images)

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AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall throws a paper plane with school children from Halton Community Combined School during a visit to RAF Halton on May 24, 2017 in Aylesbury, England. (Photo by Andrew Matthews - WPA Pool/Getty Images)

AYLESBURY, ENGLAND - MAY 24: Camilla, Duchess of Cornwall throws a paper plane with school children from Halton Community Combined School during a visit to RAF Halton on May 24, 2017 in Aylesbury, England.  (Photo by Andrew Matthews - WPA Pool/Getty Images)