The door is firmly shut to Bill Cosby's return to NBC, the network's top entertainment executive said Friday. 'That's safe to say,' NBC Entertainment Chairman Bob Greenblatt said Friday when asked if the network would ever again do a project with Cosby, who 30 years ago was the sitcom king with the network's 'The Cosby Show.' NBC's decision to sever ties with the 77-year-old comedian comes in the wake of multiple allegations of sexual assault against him, two lawsuits and a complaint to Los Angeles police earlier this week from a woman who says the comedian sexually abused her in...