The natural next step in the career of feted documentarian Joshua Oppenheimer - best known for his searing docs The Act of ...

And a vast underground ... the U.S. government designs nuclear weapons. Buddemeier and his colleagues are tasked with evaluating what could happen after an attack and how best to survive.

And a vast underground ... the U.S. government designs nuclear weapons. Buddemeier and his colleagues are tasked with evaluating what could happen after an attack and how best to survive.

At the same time, private bunker ... U.S. government designs nuclear weapons. Buddemeier and his colleagues are tasked with evaluating what could happen after an attack and how best to survive.

And a vast underground ... the U.S. government designs nuclear weapons. Buddemeier and his colleagues are tasked with evaluating what could happen after an attack and how best to survive.

And a vast underground ... the U.S. government designs nuclear weapons. Buddemeier and his colleagues are tasked with evaluating what could happen after an attack and how best to survive.