A group of U.S. legislators on Wednesday named China and Russia as the worst pirates of American movies, music and software and said Moscow should be denied World Trade Organization membership until it does more to end the theft. China and Russia together were responsible for $4 billion in U.S. business losses in 2005 due to illegal copies of copyrighted material, according to the Congressional International Anti-Piracy Caucus, a bipartisan group. Full Story