Today's program commemorates the 50th anniversary of Apollo 17, which was on the moon fifty years ago this week- the last time that human beings walked on the moon. Part One: Andy Saunders talks about studying the massive frozen film archives at NASA and selecting 400+ images which he gathered into a massive and magnificent new book called "Apollo Remastered." Many of the images have never been seen by the public before. Part Two: an excerpt from "Falling to Earth," a memoir by Apollo 15 astronaut Al Worden.