As gun debate roils on, teachers in this Texas school are already armed

In the days since a 19-year-old gunman stormed onto his former high school campus in Parkland, Fla., killing 17 people with an AR-15 assault rifle, the nation has been embroiled in a debate over what to do about school violence: How do you make it stop?

Here at Argyle High School, they already have an answer to that question: The teachers are packing handguns.

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