In a private meeting at the Ottawa economic summit, François Mitterrand slid a folder across the table to Ronald Reagan. It contained a 400-page document known as the Farewell Dossier. The material, provided by a high-placed KGB defector, Colonel Vladimir Vetrov, detailed Operation LANDESKIND. This was not petty espionage. It was a coordinated, state-directed program to acquire thousands of Western technological secrets, from computer chips to stealth aircraft designs, saving the Soviet bloc an estimated tens of billions in research costs.
The dossier listed every Soviet agent in the West tasked with technology theft and every piece of hardware the USSR sought. Mitterrand's gift was an act of realpolitik. It signaled a Franco-American intelligence rapprochement after years of tension. For Reagan's administration, it was intelligence gold. Rather than simply arrest the agents, CIA Director William Casey and his team, with French assistance, conceived a more aggressive plan: they would feed the Soviets flawed designs and sabotaged technology.
For the next several years, the CIA used the KGB's own network as a delivery system for defective blueprints and contaminated microchips. One notable result was the explosion of a Siberian natural gas pipeline in 1982, caused by software that had been deliberately altered before being 'stolen.' The operation sowed deep suspicion within Soviet industry, delayed critical military and infrastructure projects, and wasted colossal resources. The economic strain contributed to the systemic weaknesses that preceded the Soviet collapse.
The event remains obscure because its success depended on absolute secrecy. It was not declassified until the late 1990s. The Farewell Dossier operation represents a rare, nearly perfect intelligence victory. It turned the Soviet Union's greatest clandestine asset—its theft apparatus—into a weapon against itself, demonstrating that the most effective counter-espionage sometimes involves not stopping a spy, but helping him succeed.