What happened
Brown followed a white oblong object as it climbed straight up and leveled off. A second one joined it, twice left and came back, and after five minutes both went behind clouds.
All cases / Eggs and ovals / Yuma theodolite
February 4, 1953, 1:50 p.m.
Yuma, Arizona, USA
"white, oblong object"Shape words from the Project Blue Book summary
Brown followed a white oblong object as it climbed straight up and leveled off. A second one joined it, twice left and came back, and after five minutes both went behind clouds.
U.S. Weather Bureau observer Stanley Brown, using a theodolite
No explanation has been found.
Filed by Project Blue Book as unidentified.