Smart guns: could fingerprint technology solve America's shooting deaths?

The NRA is not opposed to smart guns, engineers say. So why isn't the market flooded with biometrically accessible firearms? We went to a 'smart-gun symposium' in San Francisco to find out

A federal agent lost his loaded gun in San Francisco last week after leaving the firearm on top of his car and driving off. In September, police say a man with a Glock 26 pistol stolen from a federal immigration officer's car shot and kill a beloved Oakland artist. And in July, a man allegedly used a federal ranger's semi-automatic pistol to shoot 32-year-old Kathryn Steinle in a random San Francisco killing.

The thefts and resulting gun violence have raised questions about the individual officers and agency protocols, but in San Francisco and Silicon Valley, police officials and tech entrepreneurs say the offenses shed light on a much broader issue: the need for personalized "smart" guns that only the weapons' owners can use.