Uvalde police were trained to quickly confront an active shooter. So why did they wait?

After Columbine, FBI training urged that fast action is critical to saving lives. Somehow that lesson hasn't been learned

It took more than an hour for police officers to enter and stop the gunman who killed 19 children and two teachers at Uvalde's Robb elementary school last Tuesday in Texas.

In that time, 18-year-old Salvador Ramos fired more than 100 shots while as many as 19 police officers stood outside waiting and desperate parents tried to break victims out of the school windows. It has been reported that one teacher and several children placed 911 calls while the gunman was inside the building.