The National Transportation Safety Board is investigating a midair collision between an Army helicopter and a commercial airplane near Washington, D.C., that killed 67 people, making it the deadliest U.S. air crash in almost 25 years. The crash has raised questions about sharing airspace between military helicopters and commercial planes, and has prompted fears of flying in the region. Investigators are examining discrepancies in flight data, potential altimeter malfunctions, and miscommunication with air traffic control. The pilot of the helicopter was on a night vision goggle check ride, and investigators are looking into whether the goggles were removed during flight. The helicopter crew may not have received crucial information from air traffic control before the collision. It is believed that the aircraft were equipped with an Advanced Dependent Surveillance-Broadcast system, but it remains unclear whether it was turned off. The crash has led to restrictions on helicopter traffic near the airport, and efforts to review and upgrade airspace technology. Lawmakers are also questioning the appropriateness of conducting military training missions near busy airports. Daniel Driscoll, President Trump’s nominee to lead the Army, has promised to review protocols in light of the crash.
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