This episode plays on a real incident that occurred in 1980 at a Titan missile silo located in Damascus, Arkansas. An Air Force Airman dropped a large socket wrench down the silo while performing routine maintenance puncturing the rocket skin. Unfortunately, the silo exploded killing one airman and injuring 29 others, but the warhead remained intact. This event has been chronicled in an excellent documentary released in 2016, "Command and Control."