The explosion and fire at a Fremont industrial plant killed three people and has left the site billowing in smoke days later. Here's what we know so far about the

Images taken after the Nebraska explosion show the plant's tall tower sheared off, exposing twisted steel and torn siding.

Two days after a horrific explosion at a biofuels plant left a man and two girls dead, the state fire marshal told First Alert 6 the incident started with a dust fire — and was an accident. “A preliminary investigation indicates an accidental dust explosion occurred during the manufacturing process.