Video surveillance helped authorities track down the Boston Marathon bombers and they could be used (and are being used) to thwart future attempts at attacks.

I was intrigued by this story because it revealed that we have a sophisticated weapon to help keep us safe and it's proven to be quite effective.

In New York, authorities say they have high-tech smart-camera surveillance that has prevented attacks before they could be launched over the last decade.

According to

“We’ve had 16 plots against the city since Sept. 11, and none has succeeded,” New York Police Department Commissioner Ray Kelly said in a segment that aired Tuesday on TODAY.

Kelly also said the artificial intelligence technology used in the city's 4,000 cameras can detect abnormal or suspicious behavior, such as when a person abandons a backpack, and then immediately alert police.