KGO ABC World News With Diane Sawyer August 3, 2012 00:40:00
Competition, the first african american woman to win the event. and michael phelps added to his legacy. just what you thought his story couldn't get any better, it did. bill weir leading our coverage again tonight from london. >> reporter: the greatest two hours of gabby douglas' life began with a vault. and it was better than anyone could have hoped. it put her at the top of the leader board, where she stayed through the flying squirrel playground on the uneven bars and through the balance beam, bending in lines so straight she makes architects jealous. she finished on the floor with a big gr...