Trinh Thi Ngo broadcast as "Hanoi Hannah" from North Vietnam during the Vietnam War. Her show aimed to damage the morale of American troops. Her short FBI file mentions her only in passing, in a report about a similar show that was believed to be recorded within the U.S.—the show hosts claimed to be in the Watts neighborhood of Los Angeles—and shipped to Vietnam for broadcast there.
New York Times obit: Trinh Thi Ngo, Broadcaster Called ‘Hanoi Hannah’ in Vietnam War, Dies
