The famous facility at Groom Lake has long been the subject of rumors and speculation, particularly after it became a household name in the 1990s, following Bob Lazar’s peculiar rise to fame for having allegedly worked there. During the Cold War, the CIA’s top-secret spy planes were tested at the Nevada site, for use in reconnaissance missions over the Soviet Union. Bust how "secret" is Area 51, and how much has actually been publicly known about the site for decades already?