"Armstrong had indeed reported seeing two UFOs on the rim of a crater. The
encounter was common knowledge in NASA but nobody has talked about it until
now." "...all Apollo and Gemini flights were followed, both at a distance
and sometimes also quite closely, by space vehicles of extraterrestrial
origin. Every time it occurred, the astronauts informed Mission Control, who
then ordered absolute silence."
-Maurice Chatelain (former) Chief - NASA Communications Systems, 1979