S.M. Holland Says 4 Shots Fired at JFK, From Grassy Knoll

In this CBS News excerpt, railroad supervisor S.M. Holland describes the shots he heard fired at JFK on 11/22/63, and says the third shot definitely came from the grassy knoll.

Says the third shot was quieter than the first, second, and last shot and shots 3 and 4 were fired nearly simultaneous.