Correct me if I'm wrong (which I may very well be), but *when* we go to war our border get shut down, right? So what happens to the US citizens who are spring breaking in Mazatlan, Amsterdam, etc?
Shouldn't be any different than the restrictive alerts issued after 9/11. Military bases will be on high alert and port authorities will be tighter. Even civilian airliners will be under a little more of a tighter noose... but I really doubt it could get all that tighter. Its not like we seal up into a cocoon or anything.