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Fake blood and blanks: Schools stage active shooter drills

In the wake of mass shootings from Columbine to Sandy Hook to many in between, schools have devised new and creative ways to prepare for tragedy.

A Clarksville Schools faculty member carries an air-powered practice handgun during a training exercise in Clarksville, Ark., July 11, 2013.
A Clarksville Schools faculty member carries an air-powered practice handgun during a training exercise in Clarksville, Ark., July 11, 2013.ASSOCIATED PRESS

Nona Willis Aronowitz, NBCNews.com