NTSB Highlights Failures and Faulty Equipment in D.C. Airport Collision

TL;DR
Investigators revealed multiple mistakes and government failures that led to a tragic collision between a passenger jet and an Army Black Hawk helicopter over the Potomac River on January 29, resulting in 67 deaths.
- Investigators detail points of failure leading to D.C.-area plane crash The Washington Post
- Less than a second before hitting a passenger jet, helicopter instructor told pilot to change course, NTSB hearing reveals CNN
- Key Takeaways from the D.C. Plane Crash Hearing The New York Times
- Helicopter pilots didn't know how high they were, NTSB says in DC crash hearing ABC News
- Helicopter in deadly DC airport collision had faulty altitude gauge, NTSB says BBC
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