I happened to notice this on FlightAware tonight:
https://flightaware.com/live/flight/...622Z/EGSS/KLGA
A general aviation aircraft arrival from STN. I had always assumed LGA doesn't have US CBP facilities, do they have them for GA aircraft? I was looking at past arrivals on FlightAware and the only ones I could find, other than that, were from Canada which has preclearance, no GA planes from elsewhere. So I find it odd that aircraft would be able to land there.