NTSB Reveals Altitude Discrepancies, Lost Communication With Helicopter Before Crash
The Black Hawk helicopter may have been flying with “bad data” and didn’t hear all air traffic control instructions before ...
NTSB: Night vision goggles, altitude readings may have contributed to deadly Potomac crash
NBC News' Erin McLaughlin summarizes key takeaways from Friday's briefing by the National Transportation Safety Board regarding last month's deadly plane crash over the Potomac River.