Met one of my Aunts at Heathrow (it wasn't called that then - just London Airport), inbound from Idlewild in one, when I was about 7. Saw lots of them went I cycled there regularly aged 11/12. We have one in an annex of the Imperial War Museum at RAF Wroughton (disused) which I saw about 30 years ago during an open day/fly in. Also went on board the early AWACS version at McClellan - it had aluminium cup holders on the flight deck!