Home(land) Security: Who's Cashing In?

SmartMoney.com

The $22 billion security industry is a little less, well, secure, these days -- as the drop in the number of homes with working burglar alarms (down 6 percent since 2007) attests. But that hasn't stopped some entrepreneurs from developing new ways to keep thieves away.

It's a short article with a plug for biometrics at the end.