"In the chaotic final days of the Vietnam War in April 1975, as Americans fled and their Vietnamese allies and employees prepared for the worst, John Riordan, the assistant manager of Citibank's Saigon branch, succeeded in rescuing 105 Vietnamese. They were his 33 Vietnamese staff members and their families. Unable to secure exit papers for the employees, Citibank ordered Riordan to leave the country alone. Safe in Hong Kong, Riordan could not imagine...