Active Shooter Event & Response Evolution: Sponsored by FirstNet, powered by AT&T

In the first episode of this sponsored six-part series, News Editor Joe Vince and retired LT Frank Borelli discuss the attack at Columbine High School in 1999 and how it came to be known as the "Pearl Harbor" of active shooter events. Discussed is why this attack was perceived so differently than others before it and how basic response by officers to such events has changed since then. Sponsored by FirstNet. When every second counts, first responders count on FirstNet.