School districts in Missouri have started sending staffers to firearms training so they can become an effective first line of defense in the case of a school shooting.

For a fee of $17,500, a district gets 40 hours of training for two staffers at Shield Solutions training school in West Plains, the Kansas City Star reported.

Ten Missouri school districts have taken the training so far and three more have signed contracts.

Warsaw School District officials said they felt pressured to take action after Adam Lanza, 20, killed 26 people, including 20 young children, at Sandy Hook Elementary in Newtown, Connecticut, in 2012.

“That was the catalyst for us,” said Tim Thomas, the district’s director of instruction and facilities. “We knew we had to do something.”

The company’s founder, Greg Martin, told The Star that only school district administrators and local law enforcement will know who is carrying a weapon on campus.

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