In 1994, Andy Weber was serving at the U.S. embassy in Kazakhstan when his auto mechanic asked if he wanted to buy some uranium. This was the beginning of a story straight out of spy novels, as the U.S. executed a complicated plan to smuggle out over 600 kg of bomb-grade uranium, to avoid its seizure by terrorists bent on creating their own nuclear weapon. We learn how devastating such a result would have been, and how Andy and the team at the Pentagon implemented this daring scheme to prevent such an outcome. We also hear from experts who are continuing the work today to lower the risk of nuclear terrorism.