Comment by ghaff
20 hours ago
Yes, but border control isn't security. I don't go through security when I arrive in the US either. (I do have global entry but that just means I usually go through immigration faster.) If I have a connecting flight after arriving in the US I do sometimes have to go through security again with my carryon but that's a function of airport layout.
Looks like even OP was confused about it so I guess it wasn't something to be made sense of.
Just to be clear: I understand the difference. What I couldn’t do was explain to someone who has no concept that customs are not a security check. Or that you don’t need customs for (effectively) internal flights. I suspect part of this is that in the UK, we don’t get many internal flights (beyond connections), so people don’t have an experience of just walking off a plane and out of the airport.
Yes, I meant you were confused about the nature of the comment/question (like you mentioned in a sibling response somewhere). :)