From the article I linked:
"Cody Dragoo, the foreman out at the plant, was a fireman," said Muska, himself one of the city's 29 firefighters. "He knew that plant better than anybody. He knew the dangers. He knew the chemicals there. Did we realize it could cause such an explosion? Yes, we knew it was volatile."
I understand you are blaming the lack of preperation and inspections.
Gee, what's chain of command? My military and law enforcement background isn't enough for you?