It's actually Tijuana.
No, I never heard of this.
It's a reasonable guess that the customs officials are looking for any nuclear material.
But I doubt that they are so ultrasensitive to be able to detect the miniscule amount of radiation people get during a stress test.
It's interesting info, though.
If they were looking for radiation, I am glad they are doing that.
Of course any terrorist worth his salt will go across the border at some other location, where there is no official border crossing, but we need to check everything.
You are so right.
The nice thing about radiation is that it is easy to detect even minicule amounts of it fairly easily.
I know this is a late post, but they do have pretty sensitive ones that can do it, and I know!
Your last point is what I thought too.