What city was the first to air "Soul Train"?

Cleveland, OH USA June 23 2024: sign for Soul Train a film inside the Cleveland Rock and Roll Hall of Fame in Ohio that you can see

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Don Cornelius had a vision back in 1970 that would eventually turn into the nationally syndicated, record-breaking show "Soul Train." It started with Cornelius' dream to create a version of "American Bandstand" where Black youth could see their favorite bands represented on TV. Armed with just $400, what city was the first to see Cornelius bring "Soul Train" to life?