(NPR) Ever since the Newtown, Ct., school shooting, there’s been a raging debate over how to keep America’s schoolchildren safe. National Rifle Association CEO Wayne LaPierre proposed stationing an armed guard in every school in the country. Critics said that idea was impractical and would be too expensive to carry out.

But many schools and school districts already have armed police officers. Since the Columbine High School massacre in 1999, about one-third of the schools in the U.S. have added some kind of armed security, according to federal data.

And one such district in Stockton, Calif., a Central Valley city, has had its own experience with a school massacre.

  • Text smaller
  • Text bigger
Note: Read our discussion guidelines before commenting.