School security technology at center of fierce debate after Uvalde shooting

As details have emerged from the deadly mass shooting at Robb Elementary School in Uvalde, Texas last month — which left 19 children and two teachers dead — questions have been raised about the effectiveness of security technology used at the school, experts told ABC News. In Uvalde, a school employee used a security app on his phone to trigger an internal alert system before the shooter entered the school, a spokesperson for the company behind the alert system, Raptor Technologies, said last Friday.
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