Adolf Tolkachev slipped with the US confidential information about the Soviet Master's Essence, helping Washington save billions of dollars in technology innovation.

A cold evening in the Moscow capital of the Soviet Union in January 1977, a mysterious man outside 50 years old and had to another at the gas station near the US Embassy.

The meeting is not random, this is the starting point leading to the most serious aviation secret of the Soviet history.

This agent has transferred a lot of good information to the US, pushing the Soviet defense industry to the bride to collapse.

Adolf Tolkachev on a holiday in the early 1970s. Photo: RBTH.

In the early years of the Cold War, the CIA had never had a place in espionage activities in Moscow, the US intelligence always faced difficulties in the process of recruiting agents in the Soviet agencies.

Spy activity was unexpected when Cia casually recruited Tolkachev.

In April 1979, in the first year of approaching CIA, Tolkachev said his engine in a handwritten note.

Tolkachev's records show that this is the man of the family and the main engine that leads to anti-country actions to take revenge on his wife's family.

Tolkachev lives with his wife and son in a two-bedroom apartment on the 9th floor of the building in Kudrinskaya Square, about 400 meters from the US Embassy in Moskva.

Before meeting CIA bosses, Tolkachev spent weeks of evening walks around the US Embassy area to observe diplomatic number plates, outlining the approach of American intelligence staff.

When Tolkachev bumped into the CIA night in January 1977, he just asked the opponent to Americans or not, then left a mail envelope under the car's wiper.

American officials are quite wild, because the time when CIA is about to conduct some agents in Moskva and do not want to die from the Soviet Union.

Tolkachev is trained to use the camera and a micro decoder.

The ultra-small camera system is equipped for Tolkachev.

CIA provides tolkachev some cameras, considering the feedback of this spy, then editing the design.

In 1980, Tolkachev asked to include a poison pill in the next parcel.

The sign ready to meet is usually Tolkachev open the kitchen window at a specific time.

Everything became even more risky when Tolkachev searched for documents that are not directly related to the research sector in the Fazotron Institute library.

In 1983, Fazotron Institute applied a new security regulation that made Tolkachev begin to worry.

Although nothing happened after that, Tolkachev began sucking poisoners provided by the CIA.

By June 1985, KGB somehow discovered that Tolkachev was spying and he seemed to have tried to warn the US.

On June 13, 1985, a CIA agent came to meet a two-year spy.

Here, the Soviet intelligence discovered that the package was expected to be transferred to Tolkachev, including small cameras, documents, thousands of ruble.

Tolkachev was captured by KGB officers in 1986. Photo: RBTH.

Some sources from the US said Tolkachev was sold by CIA Edward Lee Howard.

For more than 6 years, Tolkachev met 21 times CIA officers on Moscow Street.

The most modern weapons systems of the Soviet Union such as non-aircraft rocket R-24, R-27, R-33 and R-60s to the latest S-300 air defense system are seriously damaged

Thanks to the information provided by Tolkachev, the US has developed more efficient electronic combat systems and dealing with Soviet fighters more easily.

As a result, the Soviet defense system and allies are almost arrested for a long time.

At the end of 1986, the Soviet press reported that Tolkachev was executed for anti-country crimes.