LOOKBACK: The deadly school shooting that launched California's ban on assault weapons

What: 5 children killed in school shooting
When: 1989

Where: Cleveland Elementary School in Stockton, Calif.

As the nation debates how to stop school gun massacres, we look back at the mass shooting that ushered in the modern era of gun control in California. It happened in 1989, before the unimaginable became routine.

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