With the Space Shuttle fleet temporarily grounded after the Challenger Disaster, this production plant was left with two years worth of excess ammonium perchlorate - which is unstable and highly flammable. Watch what happens when the plant catches fire.
"On May 4, 1988, a fire followed by several explosions occurred at the Pacific Engineering and Production Company of Nevada (PEPCON) chemical plant in Henderson, Nevada. The disaster caused two fatalities, 372 injuries, and an estimated $100 million of damage. A large portion of the Las Vegas Valley within a 10-mile (16 km) radius of the plant was affected, and several agencies activated disaster plans."
More on Wikipedia:
https://en.wikipedia.org/wiki/PEPCON_disaster