Fran Ridge:

This report (Keyhoe called him "Earl Fogle", a pseudonym) is case #1, listed on Albert M. Chop's official Air Force clearance list. I had first read about it in Keyhoe's books. Strangely enough, again another good UFO incident NOT listed among the original Blue Book unknowns. Our thanks to Jan Aldrich for the documentation he provided in October of 2003.

Dec. 4, 1952. 8 miles SW of Laredo, Texas (BBU)
8:46-8:56 p.m. (CST). USAF pilot Lt. Robert O. Arnold, 3640th Pilot Taining Wing, Laredo AFB, flying T-28 trainer aircraft at 6,000 ft and 180 knots air speed saw a bright bluish-white glowing object below him at about 1,500-2,000 ft rapidly climbing to his level, showing no navigation lights. Arnold tightened his left turn to keep object in view, object suddenly climbed to 9,000 ft in several secs then dropped down to his altitude again headed E to 6 miles SE of AFB where it stopped and hovered. Arnold pursued on SE heading but after 2 secs object suddenly headed towards him on collision course at high speed at 8:53 p.m., wavering slightly at about 300 ft as if determining which side to pass the aircraft then heading off Arnold's left wing at 150 ft distance, at which point he could see object as a blurred reddish-bluish haze smaller than his T-28, all of which happened too fast for evasive action. Object rapidly ascended to 15,000 ft then circled left as if positioning for another pass at T-28. Arnold in fear turned off running lights, spiraled down to 1,500 ft while keeping object in sight as object continued to head towards him in a dive then pulled up and climbed S out of sight. Lighted weather balloon launched at 8:53 p.m. from Laredo AFB but was not observed by US Weather Bureau observers near any aircraft. 8 mins. (Sparks; BB files; NARCAP; BB Report 10, Feb 1953, p. 15 [BB date error Dec. 5]; Project 1947).