Pulp Magazine Cover, December 1949

This appears to be a declassified U.S. Air Force document rather than pulp magazine fiction. The text records a UFO incident dated December 26, 1949, involving aircraft No. B-29 42913 en route from Bermuda to the United Kingdom. An unidentified object traveling at approximately 600 mph approached the aircraft from the rear, detected on APQ-13 radar but not sighted visually. When the aircraft executed a 90-degree turn, the object faded from radar view after two miles. The document is signed by Colonel William A. Adams, USAF Director of Intelligence, and marked with standard national defense classification notices and reproduction restrictions typical of official military communications.