UFO News Article:
“Saucers made no ordinary fireworks”,
3 July 2006 (The Portland Tribune)

UFO Casebook presents a newspaper article on the 4 July 1947 Portland, Oregon UFO flyover:

http://www.ufocasebook.com/portlandoregon1947.html

Portland, Oregon, ca. 1930
(columbiariverimages.com image)