Yuma Test Station: 13 military meteorologists observe white circular UFO
Thirteen military meteorologists observed a flat, white, circular craft passing overhead near Yuma Test Station. The object produced a sporadic condensation trail and disappeared after approximately seven seconds. The trained specialists, experienced with atmospheric equipment, could not identify the phenomenon as any conventional balloon or aircraft.
Background
On the afternoon of April 17, 1952, thirteen soldiers from the post meteorology team conducted a field familiarization hike approximately three miles south of Yuma Test Station. While resting beneath a shade tree located between a canal bank and the Colorado River, the group witnessed an unusual aerial phenomenon.
The observers noticed a flat-white circular object traveling almost directly overhead toward the southeastern horizon. When measured against an outstretched arm, the craft appeared roughly one-quarter inch in width. It traveled at considerable speed while producing an intermittent condensation trail, vanishing completely within seven seconds.
Second Lieutenant Bernard Gudenkauf, possessing eleven years of military meteorological experience, filed an official report emphasizing his inability to match the sighting with any known meteorological balloons or equipment. All witnesses were specifically trained in atmospheric observations, making misidentification of conventional weather balloons highly improbable.