
The FBI’s mole kept searching for himself. The warning went unread.
Robert Hanssen’s case exposed failures in file controls, background checks and computer auditing that the bureau’s own watchdog documented in detail.
SPY REGISTER

Robert Hanssen’s case exposed failures in file controls, background checks and computer auditing that the bureau’s own watchdog documented in detail.

The Farewell source exposed a collection network—and gave the Americans a route into its requirements.
Elizebeth Friedman read the smugglers’ secrets, trained their pursuers and later helped expose Nazi agents across South America.
Declassified 1980 memoranda reveal the aircraft, intermediaries and bargaining behind an expanding covert arms pipeline.

MKULTRA’s surviving paperwork exposes a vast research network, unwitting subjects and a chemist worried about what his testimony might cost him.

Twenty-one years after the Egyptian bomb plot, America’s secretary of state brought it up in the Oval Office as a reason to distrust a new arrangement.

Project AZORIAN put a giant claw on the Pacific seabed. Mechanical failure and a stolen document left the CIA’s recovery mission unfinished.

A miniature engine made its wings beat; a laser was meant to guide it. Crosswinds kept the Insectothopter out of the field.

The Pueblo’s crew tried to destroy the cryptographic equipment. The ship’s design made that desperate job harder.

OXCART delivered nearly a mile of film on its first operational flight. Satellites and the Air Force’s Blackbird narrowed its future.

A child hidden under false identities became a mission for the spy chief who had captured Eichmann.

Operation COLDFEET recovered 150 pounds of documents, film and equipment. Getting the collectors home required a balloon, a line and a passing B-17.

The Joint Chiefs approved proposals for manufactured attacks, a wrecked American ship and a fake airliner incident to build support for an invasion.

The Soviet colonel’s intelligence depended on an inside contact who collected his photographs, replenished supplies and heard his fears.

CORONA photographed the Soviet Union from orbit. Reading the film required an extraordinary catch over the Pacific.

Klaus Fuchs helped build the bomb and passed its secrets to Moscow. Catching him required turning intelligence into a prosecution.

The banana company’s property dispute became entangled with Washington’s Cold War crusade. The CIA’s own record shows how far the intervention went.

A surviving internal account sets out the target, the replacement and the political machinery behind Mosaddeq’s fall.

A five-cent coin split open on a Brooklyn floor in 1953. The coded message inside defeated the FBI for four years.

Soviet schoolchildren delivered the gift. An American ambassador hung it in his office. The listening device stayed hidden until 1952.

Rejected by the Foreign Service after losing a leg, Hall built resistance networks in France and returned for an OSS mission before D-Day.
SIGSALY turned encrypted speech into a vast operation of turntables, couriers and technicians.

VENONA grew from a small Army project into a decades-long intelligence partnership. Its surviving messages also show the limits of reading an enemy’s traffic.

American codebreakers planted a lie where Japanese intelligence could find it.