Inspecting trucks? Do you have any idea how many there are in the US, and how many normally carry some form of HazMat? When I was a medic we always considered the nightmare scenario a FedEx truck (you never know what's in those things...); you want to search/scan every package?Of course you can track what is going into the trucks...fertilizer and diesel...though that becomes problematic after a while. I suspect that one change might be that the US would be a LOT nastier in terms of retaliation against suspected supporters.
The Saudis got off very lightly (i.e. no consequences at all),
The Saudis always seem to get off lightly. They didn't get invaded by Iraq, they didn't get invaded by us... when was the last time something bad happened to them, anyway?