NASA continuously edits and deletes images of ancient civilizations on the moon and mars along with so much other data i. e. the most important data ever that should be known to man.UFOS accompany, watch and observe our spacecraft according to astronauts, the lunar expeditions; no exception. And all this information is hidden away so you will never see it.
Information Source: http://www.youtube.com/watch?v=SFLbcD2HwGk