he was 73 years old. martha: the watergate hearings, he said were there any recording device in the oval office? that was a question that changed the entire investigation. he will be remembered for that. bill: the debate over future debates continue. the candidates hammering out what they want to see changed. carl cameron standing by with the latest on that. martha: what caused a russian airliner to crash in egypt. a fatal flaw in the plane or possibly a terrorist attack? >> i think an engine problem sounds like something more significant to me than a terrorism issue. you can't scownltd all this but we would have a good feel for