This story is from two years ago, but it shows armed teachers and staff can stop a gunman.

Via TriCities:

… No one knows why Cowan pointed his Honda in the direction of the Blountville, Tenn., high school, where his brother is a janitor. He is described – in court records and interviews – as a peculiar man with a history of erratic, sometimes criminal, behavior and a deep suspicion of the government.

He parked his car Monday morning in a handicapped space just in front of the school’s main entrance. Second period was just getting under way at 9:10 a.m. when Ashley Thacker, a junior, arrived at the main entrance of her high school. Thacker, 16, had been at a doctor’s appointment and was on her way to a music theory class as she approached the locked doors.

She noticed a man standing in the 10-foot waiting area between the two sets of doors, waiting to be buzzed in. His bald crown was framed with brown hair. He had a mustache, she remembered, and he was holding a cane. [...]

“He pulled out his gun and started pointing it at people,” Thacker said.

Cowan trained a .380-caliber semi-automatic pistol at Riden’s face, said Sullivan County Sheriff Wayne Anderson. Carolyn Gudger, the school resource officer, drew her gun, then shielded the principal’s body with her own.

Thacker remembers Cowan shouting something – possibly including the words “10 years” – but she isn’t sure. She turned and ran out the set of public doors to the mulch pile in the front of the school, and hid behind bushes.

“He might shoot someone,” Thacker remembered thinking. “I just wanted to get out of there.”

Riden fled and Gudger inched back into the school, leading Cowan through the scattered pastel chairs in the empty cafeteria. It was a tactical move, meant to lure the gunman into a more contained place, Anderson said.

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HT: Ace of Spades