Michael Phelps won a record-equaling sixth gold medal at the world championships with a dramatic victory in the 100-meter butterfly final on Saturday. Phelps beat his American teammate Ian Crocker in a frantic finish in a time of 50.77 seconds, the third-fastest in history and just 0.37 outside Crocker's world record of 50.40. (WCSN, WCSN.com)