ON THE AIR ON THE AIR (July 07, 2004)

Friday Swimming: U.S. Olympic Trials, 5 p.m., NBC Track and field: U.S. Olympic Trials, 8 p.m., USA Saturday Track and field: U.S. Olympic Trials, 5 p.m., NBC Sunday Track and field: U.S. Olympic Trials, 4 p.m., NBC Swimming: U.S. Olympic Trials, 5 p.m., NBC

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