An undated photograph of Mercury, NV from a distance. Credit: The National Nuclear Security Administration Toward Area 51’s ...

Military veterans say they were exposed to radiation near Area 51, and many are now suffering from severe health issues.

Area 51 fit the bill perfectly. It was in the Nevada desert near a salt flat called Groom Lake. No one knows exactly why it's called Area 51, but one theory suggests it came from its proximity to ...