Full event replay of Michael Phelps winning his gold medal in the 100m Butterfly at the London 2012 Olympic Games (3 August 2012).

Phelps was followed by a joint silver place to both Chad le Clos (South Africa) and Evgeny Korotyshkin (Russian Fed.).

Swimming has featured on the programme of all editions of the Games since 1896. The very first Olympic events were freestyle (crawl) or breaststroke. Backstroke was added in 1904.

In the 1940s, breaststrokers discovered that they could go faster b