Originally Posted by wolfie_cr

Just to add some small note here

There is a international transit , from certain locations (I assume not all) and certain airports what happens is this

your bags are tagged international-international transfer, you do NOT pick them up in the US , next time you see them it will be at your final destination

you also can go through a special transfer desk, where you do NOT get your passport stamped (this I thought it was odd, but thats what happened)

you then rejoin the normal reclear security line etc

this exists in IAH,DFW (and I think also EWR but dont recall) , MIA also must have it