Like I said, we can build a bridge connecting the Keys, we can build a bridge to connect two peninsulas in Michigan, we can build a dam to hold back millions of gallons of water... but we CAN'T build a fence in the middle of a river!?!?!!?
We have some of the best engineering minds in the world in the USA. I'm about what's possible, and know there's nothing Americans can't do if they set their mind to it.
So you stay in your world of can't. I want no part of anyone or anything that is tantamount to giving up.
Chances are good if we can put men on the moon we can probably tackle a border fence. If nothing else we can just copy what the Israelis have done. That ended 99% of their suicide bombings.