Edwin Moses: “There was no such thing as Wada [the World Anti-Doping Agency] and, in the US, I was chairman of the committee for the big six Olympic sports. I negotiated agreements to test athletes and that was the first testing outside competition.” Photograph: Simon Hofmann/Getty Images for Laureus

The number 999 is burned into Edwin Moses’s psyche. He holds the greatest winning streak in athletics for, as a two-times Olympic champion over 400m (...)