A legend is told about the days of the Great Depression. A Missouri man named John Griffith was the controller of a great railroad drawbridge across the Mississippi River. One day in the summer of 1937 he decided to take his eight-year-old son, Greg, with him to work. At noon, John Griffith put the bridge up to allow ships to pass and sat on the observation deck with his son to eat lunch. Time passed quickly. Suddenly he was startled by the shrieking of a train whistle in the distance. He quickly looked at his watch and noticed it was 1:07—the Memphis Express, with four hundred passengers on board, was roaring toward the raised bridge! He leaped from the observation deck and ran back to the control tower. Just before throwing the master lever he glanced down for any ships below. There a si…