If I'm not mistaken, the Constellation in the photo above is housed at the Pima Air Museum in Tucson, AZ. I saw it there last January during a visit, and boarded it. That aircraft supposedly was used by JFK and LBJ. Perhaps it was a backup to Air Force One, a Boeing 707 that was the site of LBJ's famous swearing-in photo on 11/22/63. Boy, was that Constellation ever cramped for space. Probably the only reason the Presidents used it was that it couldn't accommodate any reporters.