Grand Canyon

S4, E6: 1956 marked one of the most horrific air disasters in American history, and one of the most significant. A midair collision involving two major airlines shocked a nation that had come to think of air travel as luxurious and safe. An investigation led by examiner Jack Parshall confirmed that air accidents and death tolls would only rise unless immediate actions were taken. See how his pioneering methods led to major changes to the rules that govern commercial aviation, and validated the fledgling industry of air disaster investigation.