The broadcast date of the 2002 Women's U.S. Nationals on Oxygen has been changed to Sunday, June 30. The broadcast will air at 5 pm (EST). This is a change from the last rescheduled date of June 16.    The Oxygen Network will combine match coverage from the gold-medal finals in Las Vegas with feature stories on the top American competitors during the 60-minute show. The Oxygen Network has distinguished itself with creative and entertaining coverage of major women's sports events in recent years.    Calling the gold-medal matches will be the broadcast team of veteran play-by-play announcer Larry Nugent, working with color analyst Shannon Yancey, a four-time World silver medalist and top women's wrestling coach.     The event, originally held in Las Vegas, Nev. in April, featured some tremendous action in the seven weight classes in the women's division. The Oxygen Network spent the weekend covering the U.S. Women's Nationals, interviewing numerous athletes and coaches and filming a variety of feature materials.    Women's wrestling is the newest sport added to the official program of the Olympic Games, and will make its debut at the 2004 Summer Olympics in Athens, Greece.