For anyone scrolling by and wondering, these are lines from two Tom Lehrer songs: Wernher von Braun and We Will All Go Together When We Go. Used to keep the latter one on hand for classes on nuclear fallout mapping (a much more boring subject than the name might suggest) and play it while people were returning to their seats after a break. Also had the clip of Colbert acting out a nuclear explosion to spice things up a little. Serious topic and all but a little humor can help with information retention.