Enjoy the new driving section, filled with helpful tools to assist in preparing for the permit test and learning to drive.

Last week was a difficult one for Tesla. After the carmaker waged a public war of words with federal safety regulators, CEO Elon Musk picked a Twitter fight with a magazine and may have improperly revealed financial information.

So the car's RFID key card got her thinking, much as any of us would: Hey, why not put that thing in my other arm? They chip dogs, don't they?...

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