In Lake Mary, Florida, Zach Hudson, co-founder of Defensive Tactics Solutions, and his partner, Mike Friedman, recently conducted a free active shooter response workshop for teachers and school staff members.

The sound of metal hitting the floor echoed through the hallways.

“That sound should be imprinted in your brain,” told the educators in the audience. “That is the sound of survival. That is the sound of opportunity.” It was an empty clip from a gun, fallen to the ground.

That, Hudson said, is the best time to attack a shooter if one enters the school or classroom.

Read more at https://www.cnn.com/2013/09/30/living/schools-teacher-shooter-defense-training/.