Dr. Bruce Maccabee, a consultant to MUFON, has discovered new information in a very good daylight UFO sighting case by two NACA (the forerunner of NASA) employees while in Oregon near the mouth of the Rogue River. The object described below in the AF's Project Blue Book Special Report No. 14 (first published in 1955) as Case 10 was seen in 8-power binoculars.
Debunkers have said that it was just a blimp. Maccabee has tracked down the log books of the only known blimp, a Goodyear blimp, in the northwest in May of 1949. It was at Everett, Washington, at the time.
For the full story on this fascinating case, see An Assessment of the UFO Sighting at Rogue River, Oregon (May 24, 1949) at Maccabee's site.
Rogue River Case from the AF's Project Blue Book Special Report No. 14
A Reprinting and Analysis of Project Blue Book Special Report No. 14 From 1976