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Before he even had a driver's license, Greenewald was writing to the CIA, the NSA, and the Defense Intelligence Agency — requesting government documents about UFOs using a 40-year-old law called the Freedom of Information Act, or FOIA.
FOIA requests, frequently used by journalists and watchdog organizations, compel federal agencies to provide declassified information to any citizen that requests it. Greenewald says he's made well more than 2,000 FOIA requests.
And he says it's been worth the effort, yielding about half a million documents from the government.
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