Dancer and choreographer Rennie Harris says the term "hip-hop" dates back to the 1930's. Then, it was used to describe the way people hip-hopped between night clubs to dance. Harris says it wasn't until the 1970's that hip hop became a culture. That's when kids on the street developed the popping and locking dance style that caught worldwide attention. Harris began dancing as a youngster in Philadelphia. Now he leads a dance company specializing in hip-hop technique.