S4E6: Grand Canyon

Two commercial airliners go missing over the Arizona desert, and are later found in pieces, scattered along the Grand Canyon floor. It's 1956, and air disaster examiner Jack Parshall is pressed for answers. There are no black boxes or any of the advanced technology used by modern day investigators. And all he has to go on are plane fragments and his own expertise. See how Parshall and his team of experts literally pieced the accident together, and how their findings helped transform air travel as we currently know it.