history and the cuban missile crisis as the world teetered on the edge of nuclear war. that's where diane sawyer starts our preview. and he said -- >> reporter: it is stunning to hear again that singular breathy voice as she takes us become to a moment in history when america was one chess move away from all-out nuclear war. everyone terrified by russian missiles. she hears the tense debate at the white house through a door. >> and i went up and listened and eavesdropped. i could hear mcnamara saying something, and i thought i mustn't listen, and i went away. please don't send me away to camp david. please don't send me anyere. if anything happens, we are all going to stay right here with you. even if there is not enough room in the bomb shelter. i said, pleaea, jack. i just want totoe with you. and i want to die with you and the children do, too. we can't live without you. >> she also analyzes all of the players on the white house stage. like lyndon n hnson, she makes