| Director | Giuliano Montaldo |
|---|---|
| Genre | drama film |
| Runtime | 107 min |
| Country | France, Italy, United States |
This story takes place during an experiment concerning the psychological effects of mental fatigue on those locked in a fallout shelter for a long period of time. Twelve subjects are locked in a nuclear fallout shelter to see how long they can endure before mental breakdown occurs. After the experiment Dr. Herbert Monroe (Burt Lancaster) tells the world about this terrifying experiment and its outcome.