Watch Air Crash Investigation Mayday online: Episode 4 Cleared for Disaster (USAir Flight 1493/Skywest Airlines Flight 5569)

On 1 February 1991, USAir Flight 1493 collided with the waiting Skywest Airlines Flight 5569 on the runway, killing 34 people. An Air traffic controller mistakenly assigned the inbound Flight 1493 to a runway where the Flight 5569 was waiting to take off.

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