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Two new books explore how the story has evolved over the past 24 years and whether there is any truth to the claims of former government scientist Bob Lazar, who says he worked near the secret base at Groom Lake.
"They're sitting there, gradually releasing the core story, using fictionalized versions to protect classified material regarding national security, such as how they fly, how they outrun our jets," said Cameron, who is the author of "UFOs, Area 51, and Government Informants. "They want to protect that, but not have the public stuck back in 1947."
Cameron is expected to speak at the Atomic Testing Museum later this year. On Friday night, another author, aerospace engineer T.L. Keller, will speak at the museum about his new book, which examines the technology of UFOs. The museum's Area 51 exhibit is celebrating its first anniversary.
Keller's speech is open to the public.