Born during the Cold War, Area 51 in Nevada, also known as Groom Lake or Dreamland, became not only the Air Force’s most strategic test site, but also a symbol of everything that was sneaky about the U.S. military-industrial-intelligence complex.

In recent years, UFO investigators claimed that the top-secret planes tested there were built with technology gleaned from captured alien aircraft. We uncover the secrets of the cryptic desert facility and look into mysterious deaths of base workers.