World's 1st biometric 'smart gun' aims to lower shootings and suicides

ViewAt a firing range in an industrial section of Broomfield Colorado near Denver, Kai Kloepfer loads a 9-millimeter pistol and pulls the trigger.

There's a loud bang and a new hole in the paper target. He hands the gun to a reporter, who tries to fire the gun. Nothing happens.

The gun won't fire because the reporter is not...