50mi Sof Bismark unidentified aerial event — February 1957

On or during February 1957, at or near 50mi Sof Bismark, North Dakota, United States, the source reports the following sequence: BRIEF SUMMARY OF SIGHTING Red and green flashing light observed in the eastern sky. UFOHI-2-1 11FEB57 1834 5 4XX X OTHERS IN AREA AS SIGHTED IN REF SIGHTING RZ PARKER NEAR 45 MILES IN JET ABOUT 10 GROUND-AIR CO..UNICATION INTELL CENIER WRIGHT-PATTERSON AFR FORCE BASE 0.10 IN ACCORDANCE WITH AFR 200-2 THE FOLLOWING ISOF SUBIITTED: SECTION 1: A.