After a deadly midair collision in Washington, D.C., pilots started receiving alarms that they were next.
This article orginally appeared on May 9, 2025 in New York magazine.
On January 29, at 8:47 p.m., an American Airlines flight landing at Ronald Reagan National Airport in Washington, D.C., collided with a U.S. Army Black Hawk helicopter a half-mile shy of the runway at an altitude of about 300 feet. Nineteen seconds prior to impact, the jet had received a warning about the helicopter’s presence when its Traffic Collision Avoidance System (TCAS) generated an audio alert — “TRAFFIC, TRAFFIC!” — and displayed a yellow dot on the cockpit navigation system’s screen. But further aural warnings were silenced by design once the plane descended below 900 feet, so as not to distract the pilots during landing. The dot on the navigation display remained, but the flight crew’s attention had turned to the runway coming up ahead of them. Everyone aboard both aircraft died.
The accident was the first fatal crash of a U.S. commercial airliner in 16 years and the deadliest since 2001. So nerves were especially tense a month later, on the morning of March 1, when more than a dozen planes inbound for Reagan experienced similar warnings. As they were drawing near the airport, following the course of the Potomac River, TCAS audio alarms unexpectedly went off: “Traffic, traffic!” or “Descend, descend!” The pilots responded as they were trained to do, quickly putting their aircraft into a dive. But just as quickly, the flight crews realized that nothing was there. Visibility was good, and there was nothing to be seen ahead of them in the sky. The tower also saw nothing, either visually or on radar. The oncoming planes weren’t real, but some kind of electronic ghost.
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