Grain elevators across the country store billions of bushels of farm products like corn and wheat. They’re a staple of rural communities. But the dust that piles up in grain storage facilities is highly combustible. It can be six times more explosive than gun powder. Just one spark can send a blast that will shake the ground for miles. After a deadly explosion in Atchison, some of the victims’ families say the only way to put a stop to grain explosions may be to bring criminal prosecutions against grain companies. Harvest Public Media’s Jeremy Bernfeld reports.