I put up a similar article about Hungary's wall yesterday.
A physical border barrier -- a wall -- is a simple, passive, low-tech solution... that works.
It's also an extraordinarily CHEAP solution, considering the alternatives.
And this is why the liberals (even the liberal members of this forum) oppose it so vehemently (often cloaking their derision in snorts). Because the absolute LAST THING they want to see implemented is a border control device that actually does the job it's supposed to do.