After all the investigation, one final mystery remained unsolved. The NASA computers are labelled with a Contract Number: “CONTRACT NO. NAS5-2154.” NASA OIG was unable to find any records of any such contract. Given NASA once accidentally erased the Apollo 11 moon landing tapes, perhaps that shouldn‘t come as much of a surprise.

We contacted the NASA OIG for any additional info, but a spokesperson said they have no further comment beyond the results of the FOIA request.