225 of the Zapruder film, and Governor Connally was wounded in the back/chest no later than frame 240, there would not have been enough time between the wounding of the two men for Oswald to have fired two shots from his bolt-action rifle. FBI marksmen, who test-fired the rifle for the Warren Commission, concluded that the "minimum time for getting off two successive well-aimed shots on the rifle is approximately 2 and a quarter seconds", or 41 to 42 Zapruder frames. The United States House Select Committee on Assassinations published their report in 1979 stating that their "forensic pathology panel's conclusions were consistent with the so-called single bullet theory advanced by the Warren Commission". Origin The first preliminary report on the assassination, issued by the FBI on December 9, 1963, said: "Three shots rang out. Two bullets struck President Kennedy, and one wounded Governor Connally." After the report was written, the FBI received the official autopsy report which indicated that the bullet that struck the president in the back had exited through his throat. The FBI had written their report partly based on an initial autopsy report written by their agents which reflected the early presumption that that bullet had only penetrated several inches into the president's back and had likely fallen out. The FBI concluded, therefore, that the governor had been struck by a separate bullet. The Warren Commission commenced study of the Zapruder film, the only known film to capture the entire assassination sequence, on January 27, 1964. By then, the FBI had determined that the running speed of Abraham Zapruder's camera was 18.3 frames per second, and that the Mannlicher–Carcano rifle found at the Texas School Book Depository, the presumed murder weapon, could not be fired twice in less than 2.3 seconds, or 42 frames of the Zapruder film. When the Commission requested and received after February 25 higher-resolution images of the Zapruder film from Life magazine (who had purchased the film from Zapruder), it was immediately apparent that there was a timing problem with the FBI's conclusion that three bullets had found their mark. Kennedy was observed by the Commission to be waving to the crowd at frame 205 of the Zapruder film as he disappears behind the Stemmons Freeway sign, and seems to be reacting to a shot as he emerges from behind the sign a little more than a second later at frames 225