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SYDNEY, AUSTRALIA - JUNE 07: Patron of the Invictus Games Foundation Prince Harry poses with the Australian Invictus Squad as he attends the Official Launch of Invictus Games Sydney 2018 at Admiralty House on June 7, 2017 in Sydney, Australia. Prince Harry is on a two-day visit to Sydney for the launch of the Invictus Games Sydney 2018. The fourth Invictus Games will be held in Sydney from 20th to 27th October, 2018 and will include over 500 competitors from 17 nations competing in 10 adaptive sports events. (Photo by Chris Jackson/Getty Images)

SYDNEY, AUSTRALIA - JUNE 07:  Patron of the Invictus Games Foundation Prince Harry poses with the Australian Invictus Squad as he attends the Official Launch of Invictus Games Sydney 2018 at Admiralty House on June 7, 2017 in Sydney, Australia. Prince Harry is on a two-day visit to Sydney for the launch of the Invictus Games Sydney 2018. The fourth Invictus Games will be held in Sydney from 20th to 27th October, 2018 and will include over 500 competitors from 17 nations competing in 10 adaptive sports events.  (Photo by Chris Jackson/Getty Images)