American Experience (PBS) did one of their documentaries on this event. It is very well done. Prior to the socket being dropped, there was a change order issue

American Experience (PBS) did one of their documentaries on this event. It is very well done. Prior to the socket being dropped, there was a change order issued to use a new type of socket that would not dislodge from the wrench. As I recall, the two technicians tasked with the repair didn't have the new type of socket, but proceeded into the silo anyway.