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Martin Winbolt-Lewis of Great Britain receiving oxygen after completing the 400 metres during the Summer Olympic Games in Mexico City, circa October 1968. (Photo by Ed Lacey/Popperfoto via Getty Images/Getty Images)

Martin Winbolt-Lewis of Great Britain receiving oxygen after completing the 400 metres during the Summer Olympic Games in Mexico City, circa October 1968.  (Photo by Ed Lacey/Popperfoto via Getty Images/Getty Images)