UFO News Article:
“Flying Saucers Return to Prescott”, 22 May 1953
(Prescott Evening Courier, Arizona)

Three Prescott, Arizona residents sighted 8 disk shaped UFOs on 21 May 1953, at 10:00 a.m., according to the article:

http://news.google.com/newspapers?id=71koAAAAIBAJ&sjid=6U8DAAAAIBAJ&pg=5716,6003769

Aerial view of Prescott, Arizona (cardcow.com photo)