6:51 AM, 30 APRIL 1975: SWIFT 22 IS OUTBOUND WITH 11 PAX ON BOARD INCLUDING THE LZ COMMANDER. ALL THE AMERICANS ARE OUT REPEAT OUT. this traditionally short message from NSA signalls intelligence, was everything that was needed to confirm that all US citizens left US embassy Saigon. Saigon changed name to Ho Chi Minh day later, taken over by North Vietnam army. signals intelligence changed significantly from that time, but the book I’m writing about right now was published way before Snowden era.
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