The federal Warren Commission established that two shots fired by lone gunman Lee Harvey Oswald, who was located in the sixth floor of the Texas School Book Depository, struck President Kennedy from behind as he was traveling in a motorcade in Dallas. One of the bullets entered his upper back and exited near his larynx, while the second bullet entered the right side of his head and exited via his forehead.

The former president was breathing when he entered Parkland Hospital before he was pronounced dead about a half an hour later. However, what seven doctors said in the recent footage disputes the commission's claims about the event.

Jacquelynn Lueth, executive producer of "JFK: What the Doctors Saw," interviewed the seven Parkland doctors for the documentary. She wrote for CBS News last week that the doctors' "recollections were precise and clear, as if the intervening decades had melted away."

"Each of them reacted strongly when the autopsy pictures were projected on a screen," Ms. Lueth wrote. "They didn't agree on everything, but it became obvious that the way the president looked at Parkland did not match the autopsy photos taken at Bethesda even before the official autopsy began."

She added that the Parkland doctors "had no agenda other than trying to save the president's life" but stipulated that those who witnessed the wound to the president's neck "believed it was an entrance wound," which would dispute the Warren Commission's findings. "Several of them saw a gaping hole in the back of JFK's head," she said.