The Olympics when Greg Louganis hit his head on a diveboard

The American diver Greg Louganis talks about hitting his head on the diving board at the 1988 Olympic Games at Seoul, South Korea.

At the time, only he and his coach Ron O'Brien knew he was HIV positive and he had to decide whether to tell officials about the possible health risk.

This programme was broadcast in May 2012.

Picture: Greg Louganis of the US bangs his head against the board after mistiming his dive during the Olympic competition. Credit: Getty Images