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How Does the U.S. Classify Its Most Sensitive Documents?
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There are three levels of security classification for U.S. documents related to national security. What are they and who decides how they're protected against unauthorized disclosure?
How the Freedom of Information Act Works
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The Freedom of Information Act gives citizens access to government materials, but not every document is made public. Learn more at HowStuffWorks.
Ernest Withers: Iconic Civil Rights Photographer — and FBI Informant?
Why did famed photographer Ernest Withers betray the civil rights movement he so lovingly documented?
How Does the U.S. Government Declassify Top Secret Documents?
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The FBI's seizure of top secret files from Donald Trump's home shined a spotlight on the declassification system. How does the process work?
SCIFs Are Spy-proof Places for America's Top Secrets
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SCIFs are spy-proof, highly secure facilities designed for viewing and working with sensitive national security secrets. We talk to a former general counsel for the NSA to find out how they work.
How Cryptoquotes Work
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Cryptoquote puzzles conceal a famous quotation behind a solvable code. Learn how cryptoquote puzzles work at HowStuffWorks.
11 Terms Used by Spies
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Maybe you're involved in a covert operation. Maybe you're just curious. We don't need to know, but you should learn the 11 terms used by spies here.
The Mysterious Skeletons in Ben Franklin's Basement
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Human bones were found in the basement of Benjamin Franklin's London home. Lots of human bones. Was one of America's most venerated Founding Fathers a criminal of the worst kind?
6 Startling Revelations From Declassified U.S. Government Documents
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Declassified government documents can change our view of history, and also sometimes contain surprising revelations.
How CISPA Works
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The proposed CISPA cybersecurity bill is controversial. Learn what CISPA is all about.