Every 14 seconds a burglary occurs in the U.S., and though many people have ordinary alarm systems to prevent this, security expert Al Corbi says you may need a little more protection. "Alarms are a vital part of the overall system, but whether or not they protect you is questionable," he says. "If somebody breaks into your house and the alarm goes off, they're already in. It's also a stopwatch for him because as soon as it goes off, he knows he's got 30 minutes or so before the police arrive."