NTSB hearing probes causes of deadly D.C. midair collision:

NTSB hearing probes causes of deadly D.C. midair collision:

The first day of the three-day investigative hearings on the deadly midair collision over Washington, D.C., in January ended with more questions about what caused the crash between a passenger plane and an Army helicopter.  The American Airlines flight from Wichita, Kansas, collided with a Black Hawk helicopter while coming in for …

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