Aldrich Ames espionage case (1985-1994)
CIA officer Aldrich Ames began selling secrets to the Soviet Union in 1985. He passed intelligence for nearly a decade, leading to the executions of at least ten U.S. intelligence assets before his arrest in February 1994.
Ames was convicted of espionage and sentenced to life in prison.
The case exposed serious gaps in U.S. counterintelligence and prompted reforms in how agencies monitored their own personnel.
Shows what undetected espionage can cost. When counterintelligence capacity lags, foreign spies can operate for years.
