The National Highway Traffic Safety Administration (NHTSA) now recommends that drivers not use cell phones at all, except in an emergency. A great deal of research has concluded that headsets and speaker-phones don't improve safety because it's the mental distraction of talking on the phone, not holding it, that causes the danger while driving, the Wall Street Journal reported on July 19. NHTSA officials drafted a letter to be sent to all 50 U.S. governors. It said laws prohibiting hand-held cell phones while giving the green light to using headsets "will not address the problem" and "may erroneously imply that hands-free phones are safe to use while driving." It recommended that drivers not use cell phones at all, except in an emergency.