by law enforcement. >> reporter: there are three cameras on the roof. one on the left. one on the right. one on the side. they capture plates instantaneo instantaneously. if a car comes across as being stolen the officer will be instantly alerted. in this new era of digital rights and privacy some say there needs to be more transparency and limits to what information can be gathered and stored on citizens. doing nothing more than driving their cars. dan simon, cnn, san leandro, california. code for america. it's a peace corps for geeks. it's coming to the next list. our own dr. sanjay gupta explains. >> i'm dr. sanjay gupta. meet jennifer, founder of code for america. it's kind of a peace corps for geeks. >> most people have seen that geeks have changed the world so much in the past 10 or 20 years. but they haven't changed