Shot-putter Parry O'Brien died on Saturday at 75. O'Brien, a two-time Olympic gold medalist in shot put, is credited with revolutionizing shot put technique.
In the 1950s, he introduced a 180-degree turn to the throw, allowing him to throw the shot greater distances. O'Brien held the shot put world record from 1953 to 1959. Robert Siegel talks with Ron Allice, director of track and field at the University of Southern California.