One of the rare success stories in technology this past year is the rise of wireless computer networks. With a system called "Wi-Fi," users connect their computers to the Internet or nearby PC's wirelessly, at their workplace, home and in public places like coffee shops and airports. What millions of new wireless users don't know is these new-fangled networks lack basic security. With simple tools, outsiders can find computer networks, snoop around, and even do damage. Minnesota Public Radio's Jon Gordon reports.