20 Things You Didn't Know About JFK

You'd have to be a very meticulous historian to recognize the name Marion Jennings, or have worked at Parkland hospital 57 years ago. Jennings was the anaesthesiologist at the hospital when they brought in the President with his gunshot wounds.

Jennings plays himself in the brief cuts of the re-enactment. He was amazed at the amount of authenticity Stone and the crew had put into recreating the hospital, even using the same shade of green on the "Trauma Room One" sign he remembered. Of course, audiences experience all of this in black and white.