PROJECT 10073 RECORD CARD 1. DATE October 1957 2. LOCATION Dolinsk, USSR 12. CONCLUSIONS 3. DATE-TIME GROUP Local 1915 GMT 4. TYPE OF OBSERVATION ☒ Ground-Visual 5. PHOTOS ☒ No 6. SOURCE Civilian ☒ Insufficient Data for Evaluation 7. LENGTH OF OBSERVATION not reported 9. COURSE not reported 8. NUMBER OF OBJECTS one 10. BRIEF SUMMARY OF SIGHTING Witness heard tremendous sound and felt the house shake, went outside and saw a light high in the Western sky. Witness was unable to identify the object. It disappeared shortly thereafter. 11. COMMENTS Possible jet breaking sound barrier with accompanying sonic boom. Insufficient data for evaluation. ATIC FORM 329 (REV 26 SEP 52)