larson brought some papers to him, he might--he said something. but other than that, he was lost in his own thoughts. he--he continually worked. he was facing mrs. nixon. she was sitting in the chair to his right from this image. and i was just amazed at how he was really the--the--the--the loneliest man in the white house, or in this case, in the history 'cause he kept to his own thoughts. and--and he--he did a lot of pondering and a lot of note-taking as he developed whatever it is--was important to him at the time. c-span: this is a photo that you have on the cover. was that taken the same time? >> guest: this was. and--and that was a very valuable helicopter ride for me 'cause i not only got the overall interior of the plane, but i got this photograph that, to me, says more about the--the--a--a person, the way they think, how you can get insights into them by the expression on their face. a person's face is just--you know, it changes radically, depending on what they're thinking or who they're talking to. and whatever he had on his mind, it reflected this intense, pensive expression that--that is strong enough that it was on the cover. c-spa