The US needs stricter laws concerning CDL drivers and Hazmat endorsements. I have a CDL and over 10 years i have hired many drivers, offhand about 1/4th have some criminal history or drug problems.
But more importantly its newly arrived foreigners wanting to drive tankers, school busses and long haul rigs. There was recent news even of a tour bus operation that was a front for drug smuggling, anything in commercial vehicles is an opening for illegal activities more so now than years past.
Not a jetliner but a single truck practically shut down or at least bottlenecked millions, who is to say they are not or could be herded into another area just for a preplanned attack? like detonatong a device on Bart under the bay?
Any incident like this becomes another page of a terrorists teaching manual.
The Democrats weakened those DHS laws....they want to give illegals drivers licenses for crying out loud.
The Dems reaped what they sowed on this one.