It is common for people in El Paso to go to lunch and/or shop in
Juarez. They usually just go through customs with a smile and a wave.
This is true going the other way, though US Customs is a little more
thorough. (Makes me wonder just what the purpose of the proposed fence
and border patrol is, you can just WALK ACROSS THE BRIDGE!). Anyway,
are these people going to need passports? Don't think so.

My pet peeve has always been having to pay $25 to get back into my own
country (by air).