Bright object observed over Warrenville in the western Chicago suburbs (1963)

Project Blue Book Case #8506. On August 11, 1963, a bright object was observed over Warrenville, Illinois — a western Chicago suburb near Naperville in DuPage County. Fermi National Accelerator Laboratory (Fermilab) would later be built nearby, though it did not yet exist in 1963. The Chicago suburban corridor continued its steady contribution to the Blue Book files. The case was classified "Unknown."