In the setting of the Reagan Library, the GOP candidates have begun their final debate before Super Tuesday. CNN has set the stage with the former Air Force One in the background, set to look inside like Ronald Reagan was still its passenger. As the four remaining GOP presidential candidates debate who's most like their setting's namesake tonight, moderator Anderson Cooper laid the plan for some possible fireworks tonight: "The only rule tonight is, there are no rules," he said at the beginning of the broadcast.



And before the debate, fresh off his endorsement for Sen. John McCain, Rudy Guiliani arrived with the candidate to the debate tonight.