Charlie Sheen, just days after being fired from CBS' "Two and a Half Men," has fired back with a $100-million lawsuit on behalf of himself and the show's crew against Warner Bros. and Chuck Lorre, the studio and executive producer of the show, respectively. The suit, filed Thursday morning in Santa Monica Superior Court, charges that Sheen was only fired from the show because he had recently criticized Lorre both on radio and television. Warner Bros., in a letter to Sheen's attorney Martin Singer, had said Sheen was fired because he had become a liability on the show and his...