Comprehensive Catalog of 1,500 Project BLUE BOOK UFO ...

139. Dec. 9, 1948. Near Pittsburgh, Penna. (40.44° N, 7 mins 2 4 79.97° W). 3:20 p.m. (EST). USAF officers Mulling. and Col. Brown flying in a C-45 saw round object to. the N on converging course then at 250° then 270° in the W at 12,000-16,000 ft about 2 miles … ................
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