The Skyhook Balloon Sighting

A glowing object dived out of the sky and levelled off, then turned sharply and climbed away at fifty or sixty degrees with what the observers called terrific acceleration. The men watching were a General Mills crew tracking one of their own Skyhook research balloons over St Croix Falls in Wisconsin on 10 October 1951. The next day a similar object was seen from the air north of Minneapolis. The ground crew at the University of Minnesota airport followed it through a theodolite.

The archive's telling calls the leading witness a Navy scientist named Kalaszewski. His name is J. J. Kaliszewski and he supervised balloon manufacture for General Mills. The Navy link is real in a narrower sense, since Skyhook was funded through the Office of Naval Research. The telling also places the first sighting near Minneapolis when it was over St Croix Falls.

What is on the record

The record names Kaliszewski with Jack Donaghue, Dick Reilly, Doug Smith and Dick Dorion. The archive's own list spells the last name Dorian and adds the balloon project aircrew as a group. The sightings were reported to the Air Force and appear in Ruppelt's account of Project Blue Book, which lists them as unidentified. No explanation has been accepted.

The archive holds the Blue Book file itself, dated 11 October 1951 and catalogued among the project's unknowns. That is a government primary record and it counts here as corroboration.

Why it sits where it does

This case grades L4, the document-corroborated tier, because a government record carries it. Its evidence grade is official record. The claimant count of four comes from a single video on one channel and one entry is a group, so the tier rests on the Blue Book file and not on the count. The witnesses were men whose job was to follow objects in the sky. What they tracked over Wisconsin and Minnesota is not resolved here.