These secrets will shock you! For this list, we’ll be looking at deep, dark government secrets that were declassified or leaked to the public. Our countdown of insane classified secrets they don't want you to know includes secrets from WWI, WWII, the Cold War, the Space Shuttle Challenger disaster, and more! Where do you stand on government transparency? How about whistleblowers? Let us know in the comments.

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#Declassified
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