1. DATE 20 April 1955 2. LOCATION Van Nuys, California 3. DATE-TIME GROUP Local _______________ GMT 21/0630Z 4. TYPE OF OBSERVATION XX Ground-Visual □ Air-Visual □ Ground-Radar □ Air-Intercept Radar 5. PHOTOS □ Yes XX No 6. SOURCE Civilian (COC) 7. LENGTH OF OBSERVATION 8-10 minutes 8. NUMBER OF OBJECTS one 9. COURSE northwest 10. BRIEF SUMMARY OF SIGHTING One red, flashing light seems to come out of nowhere after a multi engine a/c passes overhead and moves in a straight line toward the NW. 11. COMMENTS Definitely identified as an United Airlines Flight a/c with a red, rotating beacon attached to the tail structure. 12. CONCLUSIONS □ Was Balloon □ Probably Balloon □ Possibly Balloon XX Was Aircraft □ Probably Aircraft □ Possibly Aircraft