During the Vietnam War, South Vietnam—often with CIA backing—launched covert operations to infiltrate spies into North Vietnam, but these missions rarely succeeded. Through efforts like Operation Plan 34A, agents were trained in sabotage and espionage, then parachuted or smuggled into the North. However, the communist regime’s tight internal security and extensive surveillance networks made infiltration extremely difficult. Most spies were captured soon after arrival, publicly paraded, or forced

During the Vietnam War, these POWs had a top-secret line of communication with the Pentagon. Go inside the newly declassified rescue mission to get them out on Spy in the Hanoi Hilton: https://bit.ly/33bKu9E | Smithsonian Channel Aviation Nation