Now Playing: 2-11-13 Marketplace Tech: Black Boxes in Cars, and Avoiding Email Hacks in 2013

There are so-called 'black boxes' on airplanes. Turns out many newish cars have something similar, devices that collect data that can help determine what happened in an accident. The National Highway Traffic Safety Administration is pushing for all new cars and light trucks to have these devices. And whether or not you are the member of a presidential family, you should probably change your email password more often to prevent hacks -- as well as jumble your answers to your security questions.