- Helicopter crew in collision with plane may not have heard key instruction from tower, NTSB says The Associated Press
- Black Hawk crew may not have heard message to ‘pass behind’ DC-bound plane before midair crash: NTSB Fox News
- Army Helicopter Might Have Missed Critical Instruction Before Midair Crash The New York Times
- Black Hawk helicopter’s altimeter may have been inaccurate, pilots may have missed some calls from control tower CNN
- Equipment malfunction, dropped messages looked at by NTSB in midair crash near D.C. NBC News
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