How could you keep any of this secret?

With all this fascinating and exciting news, how could you keep it secret? The answer has to be security clearances, really tough non-disclosure contracts, and people only know a piece of the story. Information is compartmentalized and one person only knows a piece. They also know who knows what information. If any appears in the press, they know exactly who to give polygraph exams to and they will do bad things to whomever discloses information. There are some pieces of the story that are capital offenses to disclose.