Seeing the original VC-54 "Sacred Cow" at the USAF Museum in Dayton was quite a thrill, as was SAM 26000 (Kennedy's 707/AF One). The Sacred Cow was pretty spartan inside compared to later aircraft, but the elevator designed to raise and lower FDR's wheelchair into/out of the aircraft was ingenious. The forward cabin in SAM 26000, where LBJ took the oath of office after Kennedy's assassination is quite small, especially when you realize how many folks were "crammed in there" to be a part of that historic occasion. It gave me chills, as did the aft cabin, where JFK's temporary casket sat during the ride from Dallas to DC.