They basically spilled the beans in this movie though.. but it was just a movie, they said. 
Of course, they mixed the truth in with some fantastic absurd bullshit, but there was still a lot divulged.

https://www.imdb.com/title/tt0453467/

Deja Vu (2006)
Contains overt Snow White references

Sometimes you can't TELL the public the truth.
YOU MUST SHOW THEM.