Don't go there: A warning sign marks the boundary of Area 51 in Nevada. Dan Callister/Getty Images hide caption itoggle caption Dan Callister/Getty Images The Two-Way Did You Know? Area 51 Nearly Killed 4 Important Visitors August 16, 2013 A declassified CIA report about the U-2 spy plane program lifts some of the veil of secrecy about a part of Nevada that fascinates sci-fi fans. For instance, the men who wanted to turn it into a top-secret site almost died the first time they went there. That's among five things interesting details.