A concrete wall and/or a sufficiently large number of landmines will do the trick just fine.
Good luck with that. Apparently you haven't spent much time along any of our borders.
I have concluded that there are many on this forum who, though they may clamor mightily for some sign that our security interests are taken seriously, will clamor stridently and even more strongly against any initiative this government puts forth in the name of counter-terrorism efforts ... "Feel-good meaures!" ... "That's not enough!" ... "The borders must be secure!"
But, alas, thus far ... no practical or constructive suggestions of a specific nature come forth. The fact is, many of the measures suggested to "secure our borders" would actually adversely affect our own good citizens while still not keeping out those who would do us harm ...
People decry anti-terrorist measures they perceive impacting negatively upon our civil liberties, sarcastically dismiss benign, but low-cost and possibly beneficial programs while offering forth ideas ("big walls and landmines") that are even more stupid.
But it's a useless initiative. I've sat through a couple of days of government anti-terrorism training
Well, I've sat through (cumulatively) at least a couple of
months worth of anti-terrorism training. And at this point, I'd have to say, along with improving our communication between agencies, services and locations, sometimes the simplest methods of detection are some of the most effective. The eyes of the ordinary citizen, familiar with his/her own terrority and the routines of all that transit through, constitute some of the best detection capabilities we can use to combat a non-traditional enemy.