If you ever get the opportunity to tour the Air Force museum in Dayton, Ohio, they have a great exhibit of all the Presidential planes used, dating back to the one Roosevelt used to fly to the Yalta conference in WWII. Very interesting to see how they have changed over the years. Since the current 747s are still in use, the last plane in the exhibit is the 707 used to carry JFK’s body back to Washington from Dallas. Its sister ship is at the Reagan library in California,