Pilots on different routes that crossed the state Thursday night reported seeing strange lights in the sky above eastern Colorado, audio recordings of air traffic communications show.
One pilot of a Southwest flight traveling from Phoenix to Minneapolis told air traffic controllers around 11 p.m., he saw bright lights appear, move from left to right and disappear in the sky outside the plane.
The pilot of a United plane headed from New York to Las Vegas confirmed the sighting to controllers at the Denver Air Route Traffic Control Center, which manages flights in a region that includes eastern Colorado, western Kansas and southern Nebraska.