KEY POINTS:
Federal officials say it was probably just some weird weather phenomenon, but a group of United Airlines employees swear they saw a mysterious, saucer-shaped craft hovering over O'Hare Airport, Chicago, last northern autumn.
The workers, some of them pilots, said the object did not have lights and shot up through the clouds, the Chicago Tribune reported yesterday.
The Federal Aviation Administration said a check of radar found nothing out of the ordinary.