I have a Checkpoint Charlie stamp in my passport, but how does it work for someone driving from Texas to Mexico? Are you detained by U.S. government security personnel to determine if you are free to leave the U.S.?
Re: “Are you detained by U.S. government security personnel to determine if you are free to leave the U.S.?”
They definitely check for outstanding warrants, or if you are a criminal suspect, or if you are smuggling items in, like guns (I guess drugs only move the other way).
And, you would be arrested if you try to sneak across without a Border Control check.
And, you would be arrested and put in jail by the Mexicans if they find you without proper documentation.
Actually, the answer to that question is yes. If you try to fly out of this country to another country that requires a visa or passport for entry, you cannot get on the plane unless you have the required visa or passport. As far as people coming from Mexico, you are mixing legally and illegally entering the country. Yes, Mexico has a responsibility as a neighbor to help to stop it’s citizens from coming to our country illegally. For those coming legally, there is no problem. As someone else said here, Mexico is a piss poor neighbor who is violating international norms.