Another image for the series. This one is featured in the "brainwashing" montage sequence of The Parallax View.

This famous picture of JFK in the oval office was taken by New York Times Photographer George Tames in 1961 and is titled "The Loneliest Job in the World." Tames on the photograph:

More info is available/sources are available at the George Tames wikipedia entry. 

President Kennedy's back was broken during the war, when that torpedo boat of his was hit by the Japanese destroyer. As a result of that injury he wore a brace on his back most of his life. Quite a few people didn't realize that. Also he could never sit for any length of time, more than thirty or forty minutes in a chair without having to get up and walk around. Particularly when it felt bad he had a habit, in the House, and the Senate, and into the presidency, of carrying his weight on his shoulders, literally, by leaning over a desk, putting down his palms out flat, and leaning over and carrying the weight of his upper body by his shoulder muscles, and sort of stretching or easing his back. He would read and work that way, which was something I had seen him do many times. When I saw him doing that, I walked in, stood by his rocking chair, and then I looked down and framed him between the two windows, and I shot that picture.¹

More info is available/sources are available at the George Tames wikipedia entry.