FILE - In this April 30, 2015, file photo, Tesla Motors CEO Elon Musk unveils the company's newest products, in Hawthorne, Calif. Just weeks after suddenly tweeting "Traffic is driving me nuts" and "am going to build a tunnel boring machine and just start digging," Musk, the SpaceX and Tesla founder says it's on the verge of happening. "Exciting progress on the tunnel front," he tweeted Wednesday, Jan. 25, 2017. "Plan to start digging in a month or so." (AP Photo/Ringo H.W. Chiu, File)
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