In February 2005, forty-one-year-old U.S. Army Reserve Staff Sergeant Jack Lewis witnessed the aftermath of a late-night crash involving a nineteen-ton Stryker armored vehicle (call sign "Rattlesnake Six-Seven") and a small car.

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Each car receives a special red license plate emblazoned with the infinity sign and the letters AU, for autonomous vehicle.

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He said he wasn't sure of the name of the street he was on and got out of the vehicle to look for a street sign or an address on a home.

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