FILE - In this Sept. 29, 2015, file photo, Elon Musk, CEO of Tesla Motors Inc., introduces the Model X car at the company's headquarters in Fremont, Calif. For years, Tesla has boasted that its cars and SUVs are safer than other vehicles on the roads, and Musk doubled down on the claims in a series of tweets this week. (AP Photo/Marcio Jose Sanchez, File)
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