[Gunslingr3]

Why would a terrorist need to get on a plane to come into this country? Why not goto South America or Canada and just cross the border like so many illegals already have.

We're to believe these folks can hop back and forth across the Hindu Kush mountains like fleas, but they couldn't handle a trek through the woods from Canada to the U.S. The idea that we could institute a Berlin Wall border policy is ridiculous upon just a moment of reflection. We're inconviencing millions of people, at a cost of billions of dollars, in the hope of inconviencing a handful of terrorists? Resources are finite and precious, and this seems like a giant waste...

[Senormechanico]

"We're to believe these folks can hop back and forth across the Hindu Kush mountains like fleas, but they couldn't handle a trek through the woods from Canada to the U.S."

What woods? There are lots of places in Washington State where roads parallel each other within FEET of each other with the border in between and not so much as a fence.
It's a simple matter of look around to see if anyone's watching and take a few steps. Done deal.
SM