c-span: i talked recently with john keegan, the historian. he was about the same age. >> guest: we're exactly the same age. c-span: do you know him? >> guest: oh, yes, sure. c-span: you quote him in the book. >> guest: oh, yes. we're in the same racket. we've been doing this for a long time. c-span: he said he got interested because there are lots of american soldiers in his village of taunton. how did you get interested in this subject? >> guest: i was a civil war historian, and in 1964 i got a telephone call from general eisenhower, who asked if i would be interested in writing his biography. he had read a couple of my civil war books. "yes, sir," said i, and it got started there. i mean, you can't do eisenhower's biography and not be interested in d-day. c-span: do you remember the first time you met him? >> guest: certainly. it was in his office in gettysburg. we talked for a whole afternoon about what access i would have, what papers would be available to me, what would be involved in doing this work. at the end of that conversation, he