Chicago Illinois, April 1951

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PROJECT 10073 RECORD CARD 1. DATE ( 2. LOCATION 12. CONCLUSIONS QO Was Balloon 26 Apr 51 Chicago Illinois O Probably Balloon 3. DATE-TIME GROUP 4. TYPE OF OBSERVATION S ems Paven ERLE LO LOE 2% Ground- Vi sual O Ground-Radar BHGQ Probobly Wos Aircroft Aircraft GMT 26/ 23252 0 Air Vi suol O Air-Intercept Rador |9 Possibly Aircraft 5. PHOTOS OU O Was Astronomical O Yes O Probably Astronomical Ne Civilian QO Possibly Astronomical 7. LENGTH OF OBSERVATION 6. NUMBER OF OBJECTS | 9. COURSE clas o 1+...