(Project Blue Book, U.S. Air Force, Washington, D.C.)
Source: Fold3.com, Lindon, Utah
The file contains 7 U.S. Air Force UFO radar photos.
Quote from NICAP.org’s report (nicap.org) on this case:
July 12 (13?), 1952; Kirksville, MO (BBU 1436)
9:00 + 9:15 + 9:20 + 9:30 +11:04 + 11:07 p.m. (CST). Many FPS-10 radar controllers at 790th AC&W Sq tracked large radar blips at 1,500+ knots (>1,700 mph) to 4,800 knots (5,600 mph) [actual speeds about 5,000 to 6,000 mphin all 6 tracks] inbound and outbound on nearly identical straight-line azimuths in about the 124-293 mile range [suggestive of real objects below about 20,000 ft within the Vertical-Lower beam of FPS-10 but not caught within higher-aimed Vertical-Center or Vertical-Upper beams limited to >2° elevation angle].”
Satellite photo of Kirksville, Missouri(tageo.com)