AP: Firms Sell School 'Hardening' as Mass Shooting Solution

By THE ASSOCIATED PRESS
NYT
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 industry's campaign to free up taxpaye...
Published date: October 2, 2018 at 03:04PM
AP
New York Times article