1h 21min - There is a long history of allegations involving alien phenomena and their supposed government cover-ups following the famed Roswell UFO crash. This special looks at UFO reports that some believe have been purposely hidden from the public.
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Hello World
Pandemic: How to Prevent an Outbreak
The King of Random
Unidentified: UFOs in the Headlines
Puppy Bowl
Global Exploration Summit
Impossible Fixes
Cosmic Collisions
Space's Deepest Secrets
Mission Tomorrow: Your Space Trivia Challenge
Punkin Chunkin
MythBusters Mini Myths
Heavy Metal Task Force
Don't Blink
Confessions From Space: Apollo
Deadly Engineering
Black Files Declassified
Building Giants
Contraption Masters
Secret Restoration
Tomorrow's World Today
Mega Machines
If We Built It Today
