Olympic gold medal swimmer and NC State grad Cullen Jones appears in one of the segments on tonight's (10 p.m.) September premiere of HBO's "Real Sports with Bryant Gumbel."

"The Swim Gap" explores the relationship between race and swimming in the U.S., and Jones' mission to bring down the number of African-Americans who don't know how to swim.

That gap is significant -- black children drown at a rate more than three times greater than whites and as many as 75 percent of African-Americans don't know how to swim.