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Most school shootings happen outside campus buildings, data shows

It's easy to focus on building security when it comes to preventing school shootings. Still, CBS News investigators looked through decades of data and found that the majority of these deadly incidents occur outside of campus buildings. CBS News national investigative correspondent Stephen Stock explains.

Most school shootings happen outside campus buildings, data shows It's easy to focus on building security when it comes to preventing school shootings. Still, CBS News investigators looked through decades of data and found that the majority of these deadly incidents occur outside of campus buildings. CBS News national investigative correspondent Stephen Stock explains.

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