Russian-linked Twitter bots unleashed fake tweets after school shooting in Florida

Hundreds of millions of tweets race out into the digital universe every day. After the shooting in Florida, computer experts started noticing twitter posts with gun messages flooding social media. The NOW's investigative reporter Jace Larson shows us many tweets weren't coming from real twitter followers, but instead computer programs up to no good. And it's not the first, and won't be the last time it happens.