"If you hear a Chinook coming, get ready."
July 21, 2015 10:32 PM Subscribe
As the North Vietnamese Army captured Saigon, Ba Van Nguyen was one of the thousands of South Vietnamese desperately fleeing the country. Nguyen, a major in the South Vietnamese Air Force, would be executed and his family would be sent to concentration camps if he was caught. But Major Nguyen had a plan: he'd moved his family to his mother-in-law's house near a soccer field, and told his wife to listen for--and be ready when she heard--the distinctive whump-whump-whump-whump chopping sound made by the twin rotors of his CH-47 Chinook, the largest helicopter in the South Vietnamese Air Force. Early on the morning of April 29, 1975…
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