Wall Street PitUS regulator closes investigation into Tesla Model S sedan firesReuters Canada(Reuters) - U.S. safety regulators said they had closed an investigation into electric sports car maker Tesla Motors Inc's (TSLA.O: Quote) popular Model S sedans. The U.S. National Highway Traffic Safety Administration began investigations into the company's ...Elon Musk Posted These Fascinating GIFs To Demonstrate Tesla's New ...Business Insiderall 28 news articles »