An RB-47H Stratojet, the electronic reconnaissance type flown in the 1957 case U.S. Air Force photo, Public domain, via Wikimedia Commons
The crew of a USAF RB-47H testing electronic countermeasures gear reported a light and a radar-emitting source that followed them from Mississippi into Oklahoma, with ground radar also reporting a target. The Condon study left it unidentified; skeptics later proposed an airliner.