National Security Agency
The NSA collects and analyzes signals intelligence and secures U.S. communications. Long so secret its initials were joked to stand for "No Such Agency," its bulk-collection programs were laid bare by the 2013 Snowden disclosures. These files touch cases where signals intelligence, code-breaking, or mass surveillance are central.
The Gulf of Tonkin incident that launched the Vietnam War was misrepresented
The naval battle that supposedly launched America into Vietnam turned out to be half real. The first attack happened. The second (the one Congress voted on) almost certainly did not, and the National Security Agency's own declassified history says the signals intelligence used to sell it was misread and then misrepresented.
Read the case file →The US government secretly runs mass surveillance on ordinary citizens
For years, warnings about a secret US government dragnet on ordinary citizens' communications were dismissed as paranoia. In June 2013, leaked and subsequently declassified NSA documents showed the claim was real: the government had been collecting Americans' phone records in bulk and tapping into major internet platforms: programs it later confirmed, a federal court found partly unlawful, and Congress moved to rein in.
Read the case file →The US Navy, NSA, and CIA secretly wiretapped a Soviet undersea military cable in the Sea of Okhotsk
Not a rumor but a documented Cold War intelligence operation: in the early 1970s, US Navy divers working from a modified submarine placed a covert tap on a Soviet military communications cable on the floor of the Sea of Okhotsk, recording years of unencrypted Soviet naval traffic, until an NSA analyst sold the secret to the KGB and was convicted of espionage for it.
Read the case file →The Stuxnet worm was a joint US-Israeli cyberweapon secretly built to sabotage Iran's nuclear program
In June 2010 a Belarusian antivirus firm isolated a strange piece of malware that turned out to be unlike anything seen before. Stuxnet was not built to steal data or extort money: it was engineered to reach into a specific industrial control system and physically wreck the fast-spinning centrifuges enriching uranium at Iran's Natanz plant. Forensic teams at Symantec and independent researcher Ralph Langner reverse-engineered its payload and showed it was a targeted act of sabotage of extraordinary sophistication. Investigative reporting then tied it to a covert US-Israeli program. What began as a fringe-sounding claim, that a government had built a digital weapon to blow up hardware in another country, is now one of the best-documented cyber operations in history, even though no state has formally admitted to it.
Read the case file →Cicada 3301 was a secret recruitment puzzle run by an intelligence agency or secret society
Three rounds of ferociously difficult puzzles, posted between 2012 and 2014 and authenticated by a single consistent PGP key, sent thousands of solvers through cryptography, steganography, phone numbers, and physical posters on four continents in search of an anonymous group calling itself 3301. Who built it, and why, has never been established.
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