10/0192 AF Letter DATE OF INFO 9 March 1950 LOCATION Selfridge AFB, Mich. SOURCE Radar Operators DATE OF OBSERVATION 3 April 1950 TIME OF SIGHTING 2046 EST SPEED Radar COURSE FLIGHT Erratic NO. OF OBS 1 NO. CHARACTERISTICS: LENGTH OF TIME OBSERVED SPEED Up to 1500 MPH ALTITUDE Up to 45,000' TYPE OF OBSERVATION Radar Scope