I think it should also appear in the record that Exhibit 479 is one of the frames from the Abraham Zapruder movie film.
Mr. Brennan, from the time you first saw the Presidential motorcade turning north on Houston from Main, did you observe the window from which you say you saw the last shot fired at any time prior to the time you saw the rifle in the window?
Mr. Brennan. Yes.
Mr. Belin. Well, what I am saying is this. You saw the motorcade turn?
Mr. Brennan. No; not after I saw the motorcade, I did not observe a man or rifle in the window.
Mr. Belin. Did you observe the window at all until after you heard that first sound which was a backfire or firecracker, at least you thought it was?
Mr. Brennan. No.
Mr. Belin. So you did not observe the window and would not know whether or not there was any man in the window during that period?
Mr. Brennan. No.
Mr. Belin. Well, let the record be clear. The first sound you first thought was what?