prosecutor do you see any criminal intent in the left turn or the two left turns? >> not at all. the fact there's not necessarily criminal conduct doesn't mean you shouldn't have a criminal investigation. if a building burns down you might open an arson investigation to see whether there was arson. so the fact that there's a criminal investigation doesn't mean you're going to find criminal conduct. it just means you're going to use the forensic tools of criminal investigators to look to see what happened. >> greg, how do we make sure relying on your expertise, how do we make sure this never happens again, that we're not years from now back in the same position of wondering what happened to a 777? >> wow, that's a good question. i think there are a couple of technologies from radar perspective you can look at over the horizon high frequency radar. it can emit thousands of miles. more advanced transponder systems coming on line that will beacon the airline's latitude, longitude and height. >> wish we had more time. there's a lot breaking tonight. gm's ceo apologizes for 13