FILE - In this July 26, 2012 file photo, men walk in front of the logo of Nissan Motor Co. at its global headquarters in Yokohama near Tokyo. Japanese automaker Nissan and NASA are teaming up to advance the technology behind cars that drive themselves. Yokohama-based Nissan Motor Co. and NASA's Ames Research Center at Moffett Field, California, announced Thursday, Jan. 8, 2015 a five-year research-and-development partnership for autonomous vehicle systems so they can eventually be applied to commercially sold cars. (AP Photo/Koji Sasahara, File)