Im thinking the window sequence and the shadow (possible a prop?) Might be your best help. My dad bought this photo and him nor I can figure it out. I work at a dang airport, too! TIA.
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It's most likely a Boeing B-29 Superfortress. It was a strategic bomber used by the US in the Pacific theater of World War II. The lower row of four windows and then another further aft matches pictures of the B-29. The "U.S. AIR FORCE" markings are a post-WWII style.
It's also possible that it's a B-50 Superfortress. This was an upgraded version of the B-29 with new engines and other changes that are hard to see in the picture. Only 370 were built. Although it's not clear when the picture was taken, and only 5 examples of the B-50 still exist. The B-29, on the other hand, has way more.
Boeing typically has the tight airforce markings near the nose. The photo bears heavy resemblance to the kb-50 as its lower nose portion fit the look when you zoom in on the OPs image you can see the window matching more then the kb-97, was just so big..
Either way they are both variants of the previous answer.
If I were to guess I'd say the picture is of the B-50 at the Pima Air Museum.