GM 'Self-Driving' Car Just 2 Years Away

CNN's Poppy Harlow talks with GM CEO Mary Barra about the future of autonomous vehicles, the potential improvements in congestion, and risks of hacking. According to Mary Barra, GM's 'self-driving' car could be just two short years in the future...

CNN's Poppy Harlow talks with GM CEO Mary Barra about the future of autonomous vehicles, the potential improvements in congestion and risks of hacking.
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