MOUNT HOLLY, N.C. — Bulletproof backpack inserts claim to offer an extra level of protection for your children as threat of school shootings continues to be unpredictable in the U.S. But do they work?

DANVILLE, Calif. (KGO) -- Back to school means backpacks, but what if you could make that backpack bulletproof? A Danville dad and tactical gear expert invented what he calls the "pak protect." ...