Refusing to give up - Julie Moss made history in 1982 when she crawled to the finish line, having collapsed just metres from the end of the Ironman World Championship in Hawaii. It was her first competitive triathlon and she came second, but as she explains to Rebecca Kesby for Witness - that heroic fight for the line changed her life, and her attitude to the sport. The moment also inspired a surge in popularity for Ironman - until then a little known event.

(Photo Copyright, Carol Hogan Photojournalism)