Living here in DC, and having seen the limo several times I can tell you this much.
- The glass is about 3-4 inches thick.
- The doors are like 2x the thickness of a normal door.
- The engine is truck engine. You can hear how heavy the note is and it can get up! I saw the shit accelerate from a traffic jam on Constitution Ave like a Vette!
- It carries cellular jamming equipment, because when it passes you - if it's on - your call drops.
- The whole thing can go into "sealed" mode and it carries its own oxygen supply in case of gas attacks.
- It's floorpan has a slight "V" to it to deflect the blast from mines.
- It ALWAYS travels in a cavalcade of 6 vehicles. 2 decoy limos with SS agents, an ambulance, and about 3 suburbans that are NO FUCKING JOKE. 2 of them are packed to the gills with body armored guards with MP5's and Carbine M4's hanging out the window.
One is mobile communications truck.
But the shit kicker is the Suburban that's completely blacked out with blacked out windows. That's the one you DO NOT want to fuck with. Inside is a Dillon M134 Gatling Gun chambered in .308/7.62mm ...
The Secret Service's testing and training range is in Greenbelt right off the B/W Parkway (about 2 miles north of the NASA entrance if you're headed north). I was lucky enough through a friend to get to see that fucker in action on the range.
You could feel the heat and your eardrums vibrated so fast they began to hurt.