US Transit
I have a flight that will give me a 9hr transit in a gateway US airport. Not wanting to spend all that time within the terminals and assuming that I'll be going through US Immigration anyway, despite being a transit passenger, will it be any problem to go out of the airport for 2-3 hrs to meet up with a buddy ? I'm not quite sure either way, so thought I'd pose the question to the well-travelled ppruners for advice :-)