Kite surfers perform on the Firth of Clyde as the weather improves in the afternoon of day two of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 15, 2016. / AFP PHOTO / Ben STANSALL / RESTRICTED TO EDITORIAL USEBEN STANSALL/AFP/Getty Images

Kite surfers perform on the Firth of Clyde as the weather improves in the afternoon of day two of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 15, 2016. / AFP PHOTO / Ben STANSALL / RESTRICTED TO EDITORIAL USEBEN STANSALL/AFP/Getty Images

(FILES) This file photo taken on July 12, 2016 shows the Boeing F/A-18 Super Hornet, a twin-engine, supersonic, all weather multirole fighter at the Farnborough Airshow. A pioneer in commercial air travel and a major player in building military aircraft, Boeing is celebrating its 100th anniversary. / AFP PHOTO / ADRIAN DENNIS / With AFP Story by Luc Olinga US-Aerospace-Anniversary-BoeingADRIAN DENNIS/AFP/Getty Images

Boeing F/A-18 Super Hornet, a twin-engine, supersonic, all weather multirole fighter takes part in a flying display at the Farnborough Airshow, south west of London, on July 12, 2016. / AFP PHOTO / ADRIAN DENNISADRIAN DENNIS/AFP/Getty Images

LONDON, ENGLAND - JULY 12: Camilla, Duchess of Cornwall shares a joke with Richard E Grant, Julian Fellowes and Miriam Margolyes as she hosts the 30th Anniversary Garden Party for the National Osteoporosis Society in St James Palace on July 12, 2016 in London, England. Due to inclement weather the event was moved indoors. The Duchess of Cornwall has been connected with the charity for nearly 30 years. (Photo by Chris Jackson/Getty Images)

LONDON, ENGLAND - JULY 12: Camilla, Duchess of Cornwall chats to Robert Hardman as she hosts the 30th Anniversary Garden Party for the National Osteoporosis Society in St James Palace on July 12, 2016 in London, England. Due to inclement weather the event was moved indoors. The Duchess of Cornwall has been connected with the charity for nearly 30 years. (Photo by Chris Jackson/Getty Images)

LONDON, ENGLAND - JULY 12: Camilla, Duchess of Cornwall gives a speech as she hosts the 30th Anniversary Garden Party for the National Osteoporosis Society in St James Palace on July 12, 2016 in London, England. Due to inclement weather the event was moved indoors. The Duchess of Cornwall has been connected with the charity for nearly 30 years. (Photo by Chris Jackson/Getty Images)

LONDON, ENGLAND - JULY 12: Camilla, Duchess of Cornwall shares a joke with Richard E Grant, Julian Fellowes and Miriam Margolyes as she hosts the 30th Anniversary Garden Party for the National Osteoporosis Society in St James Palace on July 12, 2016 in London, England. Due to inclement weather the event was moved indoors. The Duchess of Cornwall has been connected with the charity for nearly 30 years. (Photo by Chris Jackson/Getty Images)