<p>PALM BEACH, Florida -- A new computer chip promises to keep police guns from firing if they fall into the wrong hands.</p>
<p>The tiny chip would be implanted in a police officer's hand and would match up with a scanning device inside a handgun. If the officer and gun match, a digital signal unlocks the trigger so it can be fired. But if a child or criminal would get hold of the gun, it would be useless.</p>
