a silver sphere was filmed with a high speed tracking camera with data bar the sphere was 30 ft in diamer flying at 1900mph at a range of 3200 ft .N.I.S.took the film.

naval investigative service got the film .there were 3 witnesses..it was a surveyed
range used for air to ground missile test where they had to tell range and speed of the missiles once they had range thay would know the size from the film image and the data bar  in the camera mount records on the bottom of each frame of film where the camara is   aimed
Date is approximate.  We have requested more information from the source, who elects to remain semi-anonymous.  PD