FREMONT, Neb. – Following the dust explosion in Fremont that left one man and two children dead, First Alert 6 spoke with a fire safety expert to explain how that can happen. Fire Safety Expert Sherrie Wilson said a normal fire needs three components: oxygen, fuel, and an ignition source. But with a dust explosion, you need two more components: confinement and dispersion. Wilson said all of that together can cause rapid combustion. Eyewitnesses said they saw multiple explosions at Horizon Biofuels. Wilson said that it is not surprising. She explained that when the first explosion disrupted the dust in a confined space, it made the next explosion even larger. OSHA has standards to prevent dust hazards, but she feels it is not always taken seriously, she said. …Data from OSHA shows from 1980 to 2005, combustible dust incidents led to nearly 120 deaths and more than 700 injuries. Since then, OSHA has implemented a program emphasizing these dangers.