When a major Hollywood studio released Five Fingers of Death to thrill-seeking Times Square moviegoers on March 21, 1973, only a handful of Black and Asian American audience members knew the difference between an Iron Fist and an Eagle's Claw. That changed overnight as kung fu movies kicked off a craze that would earn millions at the box office, send TV ratings soaring, sell hundreds of thousands of video tapes, influence the birth of hip hop,...