* What they can do is deny you entry. For citizens, not even that.* Job lost. Father died without you seeing him. Thousands of dollars gone in lost ticket, res

* What they can do is deny you entry. For citizens, not even that.* Job lost. Father died without you seeing him. Thousands of dollars gone in lost ticket, reservations. That's more than enough for 99% of people. The other 1% don't even try to enter USA