National Geographic's Inside the Secret Service takes a rare peek inside the vehicles of the enigmatic government agency, highlighting everything from blazing fast J-Turns to the painstakingly thorough screening process for cars assigned to protect UN diplomats.
This is how President Obama's motorcade rolls
As part of a look behind the scenes into the Secret Service, The Atlantic's Marc Ambinder also came up with this diagram of a typical presidential motorcade. Read his article and you'll see why all those trucks are necessary.
