1995 CIA disinformation controversy

In 1995, it was revealed that the Central Intelligence Agency had delivered intelligence reports to the U.S. government between 1986 and 1994 which were based on agent reporting from confirmed or suspected Soviet operatives. From 1985 to his arrest in February 1994, CIA officer and KGB mole Aldrich Ames compromised Agency sources and operations in the Soviet Union and Eastern Europe, leading to the arrest of many CIA agents and the execution of at least ten of them.

Source: Wikipedia — 1995 CIA disinformation controversy (CC BY-SA 4.0)