On March 25, 1966, The Ann Arbor News published these images, captured by a local sheriff deputy. The paper described them as "strange flying objects."
Local officers in the town of Dexter, Michigan were quoted as saying the objects were “the weirdest things (they've) ever seen.”
And 54 years later, this remains one of Michigan's most famous UFO sightings.
Even the official Wikipedia page for Dexter has a passage devoted to the event:
"The Dexter area experienced 'one of the most infamous of all UFO sightings in history' when local truck driver Frank Mannor spotted a glowing object near his home."
The official report for the sighting?
But many disagreed, including the Michigan Congressman at the time (and future president) Gerald Ford, who called for an investigation on "the rash of reported sightings of unidentified flying objects in southern Michigan."
Unfortunately, the investigation never happened.
And 54 years later, the mystery lives on.
What was in the sky that night?
For more information on this historic case, I highly recommend this interview done for michiganradio.org, in which a Dexter resident recalls his memory of the incident.