There's a document called the Brookings Report that was written when NASA was first formed. It's a very long document covering at length the implications of civilian space exploration. There are, I think, two mentions in there that the discovery of intelligent extraterrestrial life could be upsetting to certain establishments of our civilization. The woo-woos have latched onto this as evidence that NASA would cover up any such finding, even though they're the only ones who even seem to remember the Brookings Report any more.
Originally Posted by Sticks
Everything I need to know I learned through Googling.