What happened
A bright silver, flat oval wrapped in a blue haze hovered, then moved very fast left, right, up and down for 45 minutes.
All cases / Eggs and ovals / O'Hare blue haze
June 29, 1952, 5:45 p.m.
O'Hare Airport, Chicago, Illinois, USA
"flat oval object surrounded by a blue haze"Shape words from the Project Blue Book summary
A bright silver, flat oval wrapped in a blue haze hovered, then moved very fast left, right, up and down for 45 minutes.
Three USAF air policemen
No explanation has been found.
Filed by Project Blue Book as unidentified.