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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.
## CONFIDENTIAL moving the knees, even though they are very mobile in the suit. I felt that, as easy as things looked, a 1-mile trek was not going to be an easy thing. Just by having to move your muscles and your body in the suit, you would end up getting tired on any prolonged trek. Because the terrain varies a good bit relative to your ability to move over it, you always have to be alert to what is coming up next. On earth you only worry about one or two steps ahead; on the moon, you have to keep a good eye out four or five steps ahead. I think the one foot in front of another is a much better mode of locomotion than the more stilted kangaroo hop. You can do it, but it doesn't seem to offer any particular advantage. When your feet are on the surface, you can do fairly vigorous sideways movements such as leaning and swinging your arms without a tendency to bounce yourself up off the surface and lose your traction. This was one experiment that was suggested and I found that you do tend to remain well-rooted on the surface where you are, despite motions that you may have. I guess the best thing in carrying this further is to answer the questions that people may have about certain specifics. I went the farthest. While Buzz was returning from the EASEP, I went back to a big crater behind us. It was a ## CONFIDENTIAL
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