What did Apollo 11 Astronauts see?

Buzz Aldrin explains an interesting encounter with an unidentified during the first mission to the moon in the video that follows. Interesting is the comments as to why the encounter was 'swept under the carpet'. Although this could have been disclosed as an unknown phenomenon - perhaps after the mission, NASA chose to ignore the sighting and ignore the phenomenon. Why could they not have come out saying that the astronauts had seem some unknown light or object during the mission? There were many new and unusual phenomenon during this new journey and it could have been any new unexplained science - they chose instead the proverbial ostrich mentality! So much for NASA.