It's one of the hottest industries in America -- and with adult movies, magazines, retail stores, and the growth of the Internet -- business is booming. The Bush administration has pledged a new attack on the porn industry and for the first time in years, there's a renewed interest in mounting prosecutions. On Thursday, February 7, as the first jury trial for obscenity since 1993 is scheduled to begin in Los Angeles, FRONTLINE investigates "American Porn" and the pending political battle that will soon engulf the multibillion dollar business and its distribution partners -- some of America's best known corporations.