So... I'll ask you... do people crossing the border get 4th amendment protection?
NO! Why should they? Once inside our border however, law abiding US Citizens should be protected. As is obvious on this thread we are not and have not been for a long time.
The phrases "for your safety or for your security" have been used by governments around the world to stick their ugly noses where they don't belong. And lets not forget the all time get out of jail free for violating the constitution: "for the children"