What We Investigate
Results: 23 Items
CIA case officer Aldrich Ames spied for the Russians for nearly a decade before his arrest in 1994.
Alger Hiss was convicted of perjury in 1950, following a lengthy espionage investigation by the FBI and its partners.
Ana Montes: Cuban Spy
Defense Intelligence Agency Analyst Ana Montes pled guilty in 2002 to passing U.S. secrets to Cuba.
Atom Spy Case/Rosenbergs
Using intelligence, the FBI uncovered an espionage ring run by Julius and Ethel Rosenberg that passed secrets on the atomic bomb to the Soviet Union.
Black Tom 1916 Bombing
On July 30, 1916, German agents blew up the Black Tom railroad yard in New Jersey, killing four in a clear act of sabotage.
Brian P. Regan Espionage
A former Air Force intelligence officer steals thousands of classified documents and tries to sell them to China, Iraq, and Libya before his arrest in August 2001.
Duquesne Spy Ring
On January 2, 1942, following a lengthy investigation by the FBI, 33 members of a Nazi spy ring headed by Frederick Joubert Duquesne were sentenced to serve a total of over 300 years in prison.
Espionage in the Defense Industry
A Russian spy attempts to lure defense secrets from a New York engineer in the 1970s.
Hollow Nickel/Rudolph Abel
A hollow nickel found by a Brooklyn newspaper boy leads to the identification of a Russian spy in 1957.
Iva Toguri d’Aquino and “Tokyo Rose”
Iva Toguri Aquino, who gained notoriety as the mythical Tokyo Rose, was the seventh person to be convicted of treason in U.S. history.
Ludwig Spy Ring
A fatal traffic accident in 1941 helps the FBI uncover a German spy ring headed by Kurt Frederick Ludwig.
Maksim Martynov, a member of the Soviet delegation to the United Nations, is identified as a spy in the 1950s.
Nazi Saboteurs and George Dasch
In June 1942, German subs dropped off four saboteurs each in Long Island and northeastern Florida, but one of the men got cold feet and turned himself in to the FBI.
ND-98: Case of the Long Island Double Agent
An FBI double agent code-named ND-98 provides disinformation to the Germans during World War II that helps the Allied cause.
Operation Lemon Aid Spy Case
The FBI uses a double agent to root out Soviet spies and learn their tradecraft in the 1970s.
Pearl Harbor Spy
On February 21, 1942, just 76 days after the tragic attack on Pearl Harbor, Bernard Julius Otto Kuehn was found guilty of spying in Honolulu.
On February 18, 2001, Robert Philip Hanssen was arrested and charged with committing espionage on behalf of the intelligence services of the former Soviet Union and its successors.
Rumrich Nazi Spy Case
In 1938, three Nazi spies were found guilty of espionage in our first major international spy case.
Thwarted Sabotage in Zambia
The FBI prevents American citizens from carrying out an act of sabotage in Zambia in the 1960s.
A mysterious letter identifies Soviet spies in the United States during World War II, including diplomat Vasilli Zubilin.
Velvalee Dickinson, the “Doll Woman”
A New York doll shop owner used correspondence to conceal details about U.S. naval forces she was attempting to convey to Japan in World War II.
A major espionage ring led by a naturalized American citizen from Russia is broken up by the FBI during World War II.
Year of the Spy (1985)
In 1985, a string of high-profile espionage arrests by the FBI and its partners led the press to dub it the “Year of the Spy.”
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