Investigators looking into the October 25, 1999 crash of Learjet 35 were faced with a puzzling question: If the supplemental oxygen was working, why didn't the crew use their masks as soon as they ran into trouble?
A private Learjet carrying golf legend and reigning U.S. Open champion Payne Stewart takes off from Orlando heading for Dallas in 1999. But within minutes, air traffic control loses contact with the aircraft. The situation grows more urgent when the plane begins an unplanned trajectory across the Midwest. Air Force F-16 fighter planes scramble to intercept the Learjet, only to discover that the pilots and passengers are dead. The only question is why it happened.
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