'Do something': Active shooter trainings teach how to fight back against a gunman

GOLDEN, Colo. - The gunman paced the hallways of the charter school, passing framed paintings of George Washington and Thomas Jefferson before stopping outside classroom 138. There, he took a deep breath, yanked open the door and began firing.

"Shooter!" shouted someone inside the classroom. "He has a gun!"

Two people seated at desks near the door jumped up and rushed the perpetrator, pinning his legs and arms against a wall, while everyone else sprinted out. It was over in 15 seconds and tiny yellow Nerf balls sprayed from the toy rifle littered the room. One of the men who rushed the gunman was struck in the thigh by a ball, a reminder of the personal danger involved in confronting an armed assailant.

The recent exercise was part of a two-day, $700 active shooter training course being offered at schools and churches across the country by an Ohio-based firm founded soon after the 1999 Columbine