that google, valentine's day, google meets bus, that happens, that may not happen to anyone else. everyone trying to program vehicles should know about the one instance because everyone can learn about that the other part about sharing, talking about all the vehicles on the road that learn all safety information, they all get to share that information. you only know your driving is going to improve because of experience you get on the road. just think of the millions of vehicles that could be adding to the vehicle that is actually taking you in a driverless car. that is opportunity you don't get with humans right now. >> another one on the checklist is vehicle cybersecurity. we recently visited with raj kumar at carnegie mellon university who is working on driverless cars. here is a little bit what he had to say. >> because they are driven by computers and hundreds of lines of software code, we have to be cognizant of and be cautious about possible threats to the technology. these could include cybersecurity attacks, if i can send information out, i can also receive information ba