Security companies spent years pushing schools to buy more products — from “ballistic attack-resistant” doors to smoke cannons that spew haze from ceilings to confuse a shooter. But sales were slow, and the industry’s campaign to free up taxpayer…
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Security companies spent years pushing schools to buy more products — from “ballistic attack-resistant” doors to smoke cannons that spew haze from ceilings to confuse a shooter. But sales were slow, and the industry’s campaign to free up taxpayer…