Since the tragedy at Sandy Hook 10 years ago, parents who lost their young children have fueled their mission for change by helping districts across the country.

The work is done through the nonprofit Sandy Hook Promise, which trains students and teachers about the warning signs of gun violence. They say their training has prevented several planned attacks at schools around the country.

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EXPANDED COVERAGE: Sandy Hook: 10 Years Later
FULL INTERVIEW: Sandy Hook Promise co-founder shares updates on nonprofit, reflects on what it means to him

"I really began this work nearly 10 years ago as a way to honor my son Daniel, who was such a compassionate, aware little boy who was always concerned about others, and we always thought that was such a beautiful quality in him," said Sandy Hook Promise co-founder Mark Barden.

News 12 Connecticut's Shosh Bedrosian spoke with Barden about the Sandy Hook Promise movement and what it means to him.