for a driver distraction accident. the driver distraction found us. reporter: it has been cited in the fatal commuter train accident in california, a deadly boat collision in philadelphia and a passenger jet that strayed 100 miles past its destination. but investigators say the true toll of distracted driving is impossible to measure. while a phone ban may be inconvenient death is inconvenient. reporter: a new drive to force american motorists to put down their phones. the ntsb says it will be working auto and phone manufacturers to find new ways to make drivers hang up. brian moore, nbc news, washington. roughly 20% of all drivers admit they texted while driving. the average goes up to 50% when the drivers are between the ages of 21 and 24. a surprise development today in the penn state sex abuse scandal. the former assistant football coach jerry sandusky walked out of the courtroom moments after his preliminary hearing was called to order. it is a move that will