We learn today from CNN:

At the police station, dispatchers began to take calls from inside the school. Authorities say the first emergency call about the shooting came in at "approximately" 9:30 a.m.

"Sandy Hook school. Caller is indicating she thinks someone is shooting in the building," a dispatcher told fire and medical personnel, according to 911 tapes.

Police and other first responders arrived on scene about 20 minutes after the first calls.

Police report that no law enforcement officers discharged their weapons at any point.

The gunman took his own life, police said. He took out a handgun and shot himself in a classroom as law enforcement officers approached, officials said.

The police station is 2 miles from the school.

Might it be fair to speculate that if the police arrived in 5 minutes, 15-20 of the 26 killed might still be alive?

If we expect the police to arrive in time to save us from a gunman, we're deluding ourselves.