Swimming: What to expect in the water

Michael Phelps beats his own world record in the 400m individual medley and claims a seventh gold in Melbourne. Michael Phelps, known to some as the best swimmer in history, will return to the Olympics with records to break. After winning six gold and two bronze medals in Athens, Phelps left some people wondering why he couldn't match Mark Spitz's 1972 haul of seven golds.