This report is not an original BB
unknown, nor has it been included in the Comprehensive Catalog of
Project
Blue Book Unknowns by Brad Sparks. The documents below give the details
of two incidents, but basically this is what the witness reported for
December 28:
An inspector at Los Alamos sighted a
fireball on 28 December. It was not falling as fast as a falling star
(meteor) he continued to watch. For several seconds, at an estimated
altitude of 6,000', the object disappeared with a green flash, lighting
up a small cloud between itself and the witness.