CBS is claiming it had no idea that a Super Bowl half-time dance routine between Janet Jackson and Justin Timberlake would feature the pop diva going partially topless. But four days before Ms. Jackson assaulted tens of millions TV viewers during the family hour with her R-rated moment, a press release by the company producing the show boasted that her dance would be "shocking." "I don't think the Super Bowl has ever seen a performance like this," Jackson choreographer Gil Duldulao said, in a press release posted to MTV's web site on Jan. 28. "The dancing is great. She's more...