my greatest love to nancy. how did you ever marry such a pretty girl? good god. reporter: then george h.w. bush also a future president does the same half an hour later. i really was proud of you. by golly i know it was tough. i just want to tell you that. reporter: now this final installment of the nixon tapes covers april to july of 1973. capturing nearly 3,000 conversations. and not just about watergate but about a wide range of topics from redskins football to the most serious subjects of the day. fascinating stuff. thank you for wading through as much as you could in a short amount of time. that s it for me, the next hour the situation room begins now with my colleague, jake tapper. thank you. happening now the words that helped prevent a shooting massacre. he told me that he was going