cities, the liberation of nazi death camps, the suicide of adolf hitler, the assassination of benito mussolini, the capture of arch nazi war criminals, victory at okinawa and the potts dam conference during which the new president sat at the negotiating table with winston churchill and josef stalin in soviet-occupied germany. humanity saw the first atomic explosion, the nuclear destruction of hiroshima and nagasaki, the dawn of the cold war and the beginning of the nuclear arms race. here's harry truman arriving for work on april 13, 1945. so we know he's an unknown quantity. the nation is in shock. fdr had just passed away, and people are very concerned because they don't really know who this guy is, right? they're very used to having fdr as their president, he's been president longer than any other man, and roosevelt arguably is the first to be considered a great american -- one of the great american presidents during his administration. so others have been considered one of greats of after their deaths. truman -- i mean, roosevelt during his administration, arguably, was considered one of t