Object observed from aircraft 20 miles south of Quartzsite in the Arizona desert (1956)

Project Blue Book Case #4270. On August 8, 1956, an unidentified object was observed approximately 20 miles south of Quartzsite, Arizona — in the scorching Sonoran Desert between Yuma and Phoenix. The airborne location designation suggests a pilot sighting. The desert below was among the most desolate terrain in North America, traversed by the Army's proving ground corridors. The case was classified "Unknown."