As reported
Light over Groningen (Netherlands) · Netherlands
A witness account on file, unevaluated. Most of the archive rests here, and honestly so.
The report, as filed
Radar-visual sighting dur. 20 minutes - audio tape from ATC by experiecend pilot of two intelligent lights
Held as-reported from National UFO Reporting Center. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.