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This is Volume 1 of NASA's Apollo 11 Technical Crew Debriefing, dated July 31, 1969. The Mission Operations Branch of the Flight Crew Support Division at the Manned Spacecraft Center in Houston prepared it, and it was originally classified Confidential. In it Armstrong, Aldrin and Collins go phase by phase through suiting, launch, powered flight, Earth orbit and lunar surface activities. They comment on suit fit, vibration, checklists, lunar dust, footing and poor sleeping conditions in the lunar module. A section titled Visual Sightings appears in the table of contents.
“Roll”17 pages
## CONFIDENTIAL was applied other than subjective. Maybe watching television would be some help. I was hammering it in about as hard as I felt I could safely do it. Unfortunately, we don't have any of the surfaces on the extension back to look at the impact. I was hitting it with the hammer to the point that I was putting significant dents in the top of it. I didn't find any resistance at all in retracting the core tube. It came up quite easily. On rotating it up to the inverted position to keep anything from coming out, I didn't find any tendency at all for the material to come out of the core tube. When I unscrewed the cutter, the surface seemed to separate again without any tendency for the material to flow or move. This meant that the consistency of this material, even though it looked to be about the same, was a good bit different. If I had some very close surface material and shifted it a little, it would tend to move from one side to the other. At the bottom of the core tube, I had the distinct impression—and it's just a descriptive phrase—that this was moist material. It was adhering or had the cohesive property that wet sand would have. Once it was separated from the cutter, there was no tendency at all for it to flake or to flow. I put the cap on, put it away, and then went to another area I would judge 10, maybe 15 feet away. I ## CONFIDENTIAL
Document, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 251 pages are in the text index: search them above, or from the library's search.