. >> one of the different principle architects of the war, defense secretary robert mcnamara makes an appearance in your book. secretary mcnamara came out later and saided war was wrong all along. >> yeah, he knew, but never said so or never do anything to it, unfortunately. yes, he makesnppearance and he goes out to a fortified hamlet. that was one of the ideas that the british brought to southeast asia that you could make these fortified hamlets and keep the vc from coming in at night and at the end of it, there's a scene where secretary mcnamara attempts to say, long live south vietnam in vietnamese. instead because he didn't use his tone correctly, and the vietnamese language depends on six tones, and what he told the audience, the southern duck wants to lie down so everyone laughed. and that incident actually happened. so i put it in there, i thought it was emblematic of some of our ignorance. >> host: so, 60 years on, peter prichard, president johnson sends more and more troops, general mcnamara didn't admit it was a mistake all along. what do you think the motivation was mere i