How many of us do not envy the US Presindent and his fancy limousine? But in fac his limo is nothing more than a hand-crafted and armored version of the Cadillac DTS. it was first used during the second inauguration of George W. Bush in the January 20, 2005 parade.

The DTS was customized by Hess and Eisenhart O'Gara armored vehicle builders who have been building armored presidential limousines since the 1960s. Altough the base is a DTS, little of the original vehicle remains. DeVille's flush-style door handles have been replaced by a loop-type design apparently borrowed from the 1992-99 generation Buick LeSabre, doubling as grab-handles for the United States Secret Service agents running alongside the car. Exterior examination suggests that the head/tail lights, and the wreath-and-crest emblem atop the grille are some of the few stock components.

The interior features a rear foldaway desktop, an extensive entertainment system featuring a 10-disc CD changer, and adaptive, massaging cushions. The president sits in the rear, facing a console-mounted secure communications panel connected to five antennas mounted on the trunk lid.

The exterior is paneled with five inches of ballistic armor, and is said to be able to withstand anti-tank grenade launchers. The underside of the car is also armored. The windows, which do not open, are transparent armor thick enough to block sunlight, which is the reason the interior is illuminated with naturalistic artificial lighting. The doors require automatic systems to open and the car has a run-flat tire system. The limousine is also environmentally sealed against chemical and biological attacks. A four wheel drive system to improve traction might also be fitted.

The Presidential Limousine uses the call sign "Cadillac One. "Cadillac One is transported everywhere the President goes, and is airlifted on domestic and international trips by Air Force transport planes. Cadillac One remains amoungst one of the most distinct automobiles in the world with its imposing frame and the Presidential Seal clearly affixed to the rear doors. When the President travels on domestic trips and working international trips, Cadillac One flys the American Flag and the Presidential Flag. When the President however performs a State Visit to a foreign country, the Presidential Flag is replaced by the flag of that country.