It might not reduce the frequency... but I suspect that it would dramatically reduce the number of people killed.

In a strange coincidence, a 36-year-old man rampaged through a Chinese elementary school with a knife on Dec. 14, the very same day the Sandy Hook attack occurred.

At Sandy Hook, 20 children and 6 teachers died from gunshot wounds.

In China, 20 children and one teacher were stabbed...

All survived.