John A. Walker

John A. Walker was a U.S. Navy chief warrant officer who, in the 1980s, secretly sold classified military and naval documents to the Soviet Union. His actions compromised U.S. security, notably during the Cold War, and led to the loss of sensitive information. Walker betrayed his country by turning over secrets that could be used against American interests, and his espionage activities damaged U.S. intelligence efforts for years. In 1985, he was caught, tried, and sentenced to life in prison. His case is a well-known example of espionage and treason, highlighting vulnerabilities within U.S. military security.