Elon Musk, co-founder and chief executive officer of Tesla Motors Inc., speaks during a news conference at the Nevada State Capitol building in Carson City, Nevada, U.S., on Thursday, Sept. 4, 2014. Tesla will build the world’s largest lithium-ion battery plant in Nevada, bringing a $100 billion boost to the state’s economy over two decades, Governor Brian Sandoval said. Photographer: David Calvert/Bloomberg *** Local Caption *** Elon Musk
