Shortly after Apollo 11, Wernher von Braun, one of the fathers of rocket science, proposed that we develop a reusable Nuclear Thermal Propulsion (NTP) rocket to colonize the Moon. Today, NASA engineers are still struggling to pick up where he left off. An interesting technical report that NASA prepared for the Space 2013 Conference and Exposition has recently been released. In it, we can find some of the latest, and oldest, ideas for a NASA-made nuclear thermal rocket that would take us back to the Moon.