This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's worst air disaster in more than a decade, aviation experts said.
The Blackhawk that struck an American Airlines flight landing at Reagan airport had three soldiers on board and no VIPs or senior officials were involved.
All 64 people aboard an American Airlines jet that collided with an Army helicopter were feared dead in what was likely to be the worst U.S. aviation disaster in almost a quarter century, officials ...
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