hear the action of the bolt, and I could hear the cartridges drop on the floor."53 After pausing for a few minutes, the three men ran downstairs. Norman and Jarman ran out of the front entrance of the building, where they saw Brennan, the construction worker who had seen the man in the window firing the gun, talking to a police officer, and they then reported their own experience.54

On March 20, 1964, preceding their appearance before the Commission, these witnesses were interviewed in Dallas. At that time members of the Commission's legal staff conducted an experiment. Norman, Williams, and Jarman placed themselves at the windows of the fifth floor as they had been on November 22. A Secret Service agent operated the bolt of a rifle directly above them at the southeast corner window of the sixth floor. At the same time, three cartridge shells were dropped to the floor at intervals of about 3 seconds. According to Norman, the noise outside was less on the day of the assassination than on the day of the test.55 He testified, "Well, I heard the same sound, the sound similar. I heard three something that he dropped on the floor and then I could hear the rifle or whatever he had up there."56 The experiment with the shells and rifle was repeated for members of the Commission on May 9, 1964, on June 7, 1964, and again' on September 6, 1964. All seven of the Commissioners clearly heard the shells drop to the floor.

At the Triple Underpass

In contrast to the testimony of the witnesses who heard and observed shots fired from the Depository, the Commission's investigation has disclosed no credible evidence that any shots were fired from anywhere else. When the shots were fired, many people near the Depository believed that the shots came from the railroad bridge over the Triple Underpass or from the area to the west of the Depository.57 In the hectic moments after the assassination, many spectators ran in the general .direction of the Triple Underpass or the railroad yards northwest of the building. Some were running toward the place from which the sound of the rifle fire appeared to come, others were fleeing the scene of the shooting.58 None of these people saw anyone with a rifle, and the Commission's inquiry has yielded no evidence that shots were fired from the bridge over the Triple Underpass or from the railroad yards.

On the day of the motorcade, Patrolman J. W. Foster stood on the east side of the railroad bridge over the Triple Underpass and Patrolman J. C. White stood on the west side.59 Patrolman Joe E. Murphy was standing over Elm Street on the Stemmons Freeway overpass, west of the railroad bridge farther away from the Depository.60 Two other officers were stationed on Stemmons Freeway to control traffic as the motorcade entered the Freeway.61 Under the advance preparations worked out between the Secret Service and the Dallas Police Department, the policemen were under instructions to keep "unauthorized" people away from these locations.62 When the