I was based in JFK for a couple of years back when Delta was in the old Pan-Am Terminal 3. The big circular rotunda provided shelter to walk to the aircraft, but that quickly became obsolete when jet bridges were invented. Later the terminal expanded and it had an interesting road way up into it. It was finally knocked down a few years ago. JFK always is interesting to me in that each major airline built it's own terminal without much thought in how any of them connect with each other, or lack there of. I got a field tour back in 2003, and you can see even the cargo operations are like this. Obviously, it's still like this, although the operators have come and gone over the decades. As far as United, I was surprised to see them leave. It was them and American that competed directly with high yield flights to LAX and SFO. AA offered wide body 767 Flagship service almost every hour. I never took United when they were there, but I understand that they offered similar service. Their new president, Scott Kirby said it was a mistake to pull out of JFK, as there were quite a few high dollar United loyalists out on Long Island. To keep the thread on topic, I've yet to visit the TWA Hotel. Hopefully I can get over there in the next few weeks or months. I'm always looking for an excuse to visit NYC.