Oh boy I need to step in here.First of all the USS Indianapolis delivered the 2 weapons to Tinian .They would not have been able to get them on a
submarine,way to big.
Now,the vehicles you are trying to link to are NOT owned or operated by a commercial carrier,nor do they have any markings to indicate they do.
They are called Safe Secure Trailer (SST) and Safeguards Transporter (SGT).Operated by DOE the drivers are highly trained ex-military.Not necessarily
Spec war, but still well trained and well armed,very well armed. All the vehicles are armored. The escort vehicles are usually dark colored
Suburbans.There are usually three of them.Four in each vehicle.They are WELL armed with everything you can imagine.
The semi-tractor(STG) is heavily armored as well.Cat engine with automatic transmissions,no grabbing gears here. The cab over vehicle has a sleeper
but it has two seats in back,no bed.There are four well armed men inside.Well armed. There are firing ports.Run flat tires, automatic sanders for
slick roads.
They are in CONSTANT contact with their dispatch in New Mexico.Now days they even have real time video of where they are. There is always aerial armed
support somewhere up there,Always.
Every law enforcement officer,knows that there is a "special mission" coming through their sector. They may not no who or what but they or their
superior know.Always. No SST/STG has EVER been pulled over by a trooper. Pity the one that does.
The transport trailer(SST). Standard with of a trailer is 96 inches(8 Feet). these look normal enough on the out side. Open the 12" thick back doors
and climb inside,a normal person can put their arms out from their sides and lay their palms flat against the wall.Yes their thick. The top and bottom
is that thick too.
Look up and you see nozzles coming out of the ceiling. They carry a chemical on board actually two.One they purge the air out and put inside.The
second one comes out of the nozzle.
There are a number of ways this system can be activated.One is from the cab by the team leader. Two is from any of the escorts by the team leader(each
vehicle is a team). Thirdly from control. Finally there is a inclinometer(I hope I spelled that right).
If the trailer get off level by a certain degree,such as tipping over. Once this happens the entire inside of the trailer is filled with expanding
foam that gets harder than concrete.
Bring a jack hammer,you'll need it and about a month.
One actually ran of the road in Pennsylvania in the late 70's early 80's time frame on a slick road.Rolled down a hillside. Of course you didn't
here about it,but it happened. When they got the trailer back to Pantex,it took them a month to jack hammer the foam out. But the devices were not
harmed.
I use to load and unload these vehicles about once a month.I can spot them on the road in an instant, but most people can't.They do run government
plates though.An their headlights are brighter because they run multiple alternators.
You would really have to have a death wish to mess with these guys though.
Here is a wiki link.
Office of Secure Transportation