Ah, I misread (but can't edit any more)... lots of online content describing CBP/ICE operations near major international airports, which I took to mean those ai

Ah, I misread (but can't edit any more)... lots of online content describing CBP/ICE operations near major international airports, which I took to mean those airports were considered borders that start a "new" 100 mile zone. That's incorrect (per the ACLU post in the sibling comment) - it just happens that many major airports are within the 100 mile zone, so CBP/ICE can run operations there (beyond what they might run at an airport well inside the heartland).