 Opening arguments today in the trial of actor Alec Baldwin. He is accused of being careless with that gun on a movie set and killing the director of photography. He didn't do any of the things that he was supposed to do to make sure that he was safe or that anyone around him was safe. That's the prosecutor. Baldwin says the gun just went off when he cocked it. It was not supposed to be loaded with real bullets, and we still don't know why it was.