“There have been only two kinds of CIA secret operations: the ones that are widely known to have failed—usually because of almost unbelievably crude errors—and the ones that are not yet widely known to have failed.”
Edward Luttwak
“If some double agent told the KGB the Americans were alert to Line X and were interfering with their collection by subverting, if not sabotaging, the effort, I believed the United States still could not lose. The Soviets, being a suspicious lot, would be likely to question and reject everything Line X collected. If so, this would be a rarity in the world of espionage, an operation that would succeed even if compromised. Casey liked the proposal.”
Gus W. Weiss
“So the accomplishments of FAREWELL, in summary, are enormous. It was a major — major — accelerator to the end of the Cold War. (…) It was a critical and heroic accomplishment by President Mitterrand and his government, whatever the intentions may have been at the time…”
Richard V. Allen — President Ronald Reagan’s Former National Security Advisor

On July 19 1981 President Ronald Reagan met with French President Francois Mitterrand in Ottawa, Ontario at an economic summit. Mitterrand informed Reagan about the “Farewell Dossier”.
August 18 2016 — Not everyone will agree with Ed Luttwak’s analysis which is undoubtedly a tad unfair. There is no doubt that the Farewell Operation was an extraordinary successful operation. And yet everyone suspected everyone of lying about it. It just seemed too good to be true. Follow us on Twitter:@INTEL_TODAY
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RELATED POST: On This Day — Dr Gus W. Weiss Dies Under Mysterious Circumstances (November 25 2003) [2019]
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For instance, William Saffire wrote the following in the New York Time:
“Intelligence shortcomings, as we see, have a thousand fathers; secret intelligence triumphs are orphans. Here is the unremarked story of “the Farewell dossier”: how a C.I.A. campaign of computer sabotage resulting in a huge explosion in Siberia — all engineered by a mild-mannered economist named Gus Weiss — helped us win the cold war.”
However, there is a small problem with Saffire’s argument. According to Weiss himself, this operation would have been considered a success no matter the outcome!
“If some double agent told the KGB the Americans were alert to Line X and were interfering with their collection by subverting, if not sabotaging, the effort, I believed the United States still could not lose.
The Soviets, being a suspicious lot, would be likely to question and reject everything Line X collected. If so, this would be a rarity in the world of espionage, an operation that would succeed even if compromised. Casey liked the proposal.”
LINE X
In the 70’s, the Russians were badly trailing Western countries in micro-electronics and computers.
Thus the KGB was tasked with the mission to systematically spy on Western R&D programs.
Directorate T was created solely for this purpose and its operating branch was named “Line X”.
In 1981, Colonel Vladimir I. Vetrov contacted French Intelligence and, over the next couple of years, supplied them with about 4000 documents “LINE X” had obtained.
President Mitterrand passed the information to President Reagan.
The “FAREWELL” Project
A CIA economist, Gus W. Weiss, suggested to William Casey to actually supply the material sought by the Russians.
The equipment would be designed to pass initial tests but would eventually fail due to intentionally added flaws.
“Contrived computer chips found their way into Soviet military equipment, flawed turbines were installed on a gas pipeline, and defective plans disrupted the output of chemical plants .”
Weiss believed that when historians will sort out the reasons for the end of the Cold War, the “Farewell Project” should receive a well deserved “footnote”.
A Bizarre Episode
In 1982, Vetrov was arrested and jailed for murder. While in jail, his espionage activities were discovered. Colonel Vetrov was executed in 1983.
According to Weiss, the case took a bizarre turn when information on the “Farewell Dossier” surfaced in 1985.
Mitterrand came to suspect that Vetrov had all along been a CIA plant set up to test him to see if the material would be handed over to the Americans or kept by the French.
Acting on this mistaken belief, Mitterrand fired the chief of the French service, Yves Bonnet.
A Mysterious End
Dr. Gus Weiss died on November 25 2003 under what the UK newspaper The Independent has characterized as “mysterious circumstances”.
Gus W. Weiss’ body was found on the walk beneath his upstairs apartment in the Watergate building in Washington, DC.
The local medical examiner ruled his death a suicide, according to The Washington Post.
In Popular Culture
Farewell (French: L’affaire Farewell; literally The Farewell Affair) is a 2009 French film directed by Christian Carion, starring Guillaume Canet and Emir Kusturica.
The film is an espionage thriller loosely based on actions of the high-ranking KGB official, Vladimir Vetrov.
It was released in the United States in June 2010. It was adapted from the book Bonjour Farewell: La vérité sur la taupe française du KGB (1997) by Serguei Kostine.
REFERENCES
The Farewell Dossier: Duping the Soviets — Gus W. Weiss
The Farewell Dossier — NYT William Safire
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The “FAREWELL DOSSIER”
4 Years Ago — The FAREWELL DOSSIER