(ASSOCIATED PRESS) — METHUEN, Mass. — With students off for the Veterans Day holiday, a simulated school shooting at Methuen grammar school Tuesday showed what “active shooter” technology could do to help police catch a gunman if the horrible threat ever strikes as it has at other schools across the country.

In the live demonstration, the “gunman” entered the school armed with an assault rifle, opening fire with dummy rounds first in the school library then rampaging through hallways and classrooms.

But he had only a few minutes to wreak havoc.

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