First, any conventional Nuclear weapon detonated on US soil via panel van or low boy trailer would be limited to that of a tactical single stage device with a yield a fraction of the Hiroshima and Nagasaki weapons.
Those weapons are highly technical. The smallest nano second of deviation in timing of the multiple explosive charges that take a sphere of highly enriched plutonium to it's critical mass would turn it into a "fizzle" instead of a multi-ton yield.
Its why there has been no Nuclear attack like that on American soil. Nuclear weapons, even the old one's have to be continually serviced to remain effective. The Nuclear suitcase everyone use to fret about would have to weigh at least a 100 pounds.
Now a thermal Nuclear weapon being transmitted via cargo van or tanker is even less likely. Given the Hydrogen isotopes ( tritium and dueterium ) have very short half lifes and have to be continually serviced and replenished, or the bomb reverts from a say 40 megaton to just the yield of the nuclear trigger needed to reach the temperatures that tritium and dueterium will fuse at.
The threat has always been a dirty bomb for a reason. It's virtually impossible to get a hold of some of the internal componenets needed and even harder to get a hold of enough radioactive isotope to complete a fusion weapon.
They are too technical for the likes of Al Qaeda, for now anyway.
After that "wake-up" call, I bought two solar ovens, and I have practiced using them a lot over the years. Believe it or not, food actually tastes better, and there is little shrinkage with food cooked that way. I haven't experimented with baking biscuits yet, but bread does fine. If I have to cook everything that way, at least I know how. Maybe "early to bed, early to rise" would become the way we live?
BTW, Hillary was giving solar cookers by the thousands to third world countries a while back, so they didn't have to use scarce wood for cooking fires. That was a good move!
YOU KNOW its bad when David Cay Johnson calls you a dictator:
David Cay Johnston calls the DOJ“All governments leak when they want to,” Johnston says. “The actions of the administration in this case are the actions of a dictatorship. They are not the actions of a free people whose government is responsible to them.”
"The fact that we are here today to debate raising America's debt limit is a sign of leadership failure" - 2006 Senator Obama...leadership failure indeed!