DOW UAP D097 Project Sign Progress Report 1948

According to the releasing agency, this file is an initial progress report produced by the Air Materiel Command concerning Project Sign, a 1948–1949 U.S. Air Force program established to investigate the nature and origin of unidentified flying objects. The report details 100 UFO sightings occurring between 1947 and 1948. The file additionally contains an article titled "The Biology of the Flying Saucer," excerpted from The Aeroplane, an aviation-focused periodical published between 1911 and 1968. The item was released as part of a Department of War UAP disclosure collection. No extractable text was available from the image itself; this summary is drawn from the publisher-provided page context. The associated image is described as a black-and-white photograph of a large, delta-winged aircraft prototype marked confidential.