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the Interior. color. TACTICS: The stationary light appeared to emanate above "smoke or fumes which appeared cloud- like;" after eight minutes, it focused a beam straight downward - observer's estimate of the beam width was "one hundred feet or, more;" the traveling light moved in a southerly direction for about two to three minutes before it turned in an easterly direction and disappeared. COMMENT: The Air Force investigator checked the position of the planet Jupiter for that area at the time of the first sighting and found it to be almost identical with the described position of the UFO. Since the thickness of the atmosphere at the horizon could act as a magnifying lens, the planet Jupiter would appear to be much larger than it actually was and also appear to cast a broad beam downward. Evaluation of the first UFO sighted by this observer was that it was Jupiter he saw. The second sighting by the same observer is categorized as "unknown," since there was no scientific explanation for it. TIME/PLACE OF SIGHTING: April 17, 1960, at 8:29 A.M. CST/Richards-Gebaur Air Force Base, Missouri (20 miles south of Kansas City, Missouri). Pine Creek Ranch on State Highway 82 in Monitor Valley, Nye County, Nevada. DURATION: Eight minutes for the first object; two to three minutes for the second object. NUMBER OF OBSERVERS: One. TYPE OF OBSERVER: Geologist working for the Bureau of Land Management, U.S. Department of NUMBER OF OBJECTS: Two. OBSERVER RELIABILITY: Should be good. SHAPE: Both objects were described as large lights. DIMENSIONS: See SHAPE. COLOR: First light observed was bright and white; second one glowed with an orange-yellowish SOUND: None. ALTITUDE: Not estimated for the first object; second object was "fairly low over the east-lying Monitor Range." SPEED: First object was hovering; second object was "traveling at very high velocity."