Tank E610 lies inside the Bhopal India Union Carbide factory, it's from this tank that, during the Bhopal disaster of 1984, 42 tons of methyl isocyanate burst out. 4000 people died, 100,000s were seriously injured.
Bhopal is said to be the worst industrial accident of all time.
http://en.wikipedia.org/wiki/Bhopal_disaster
http://www.lightstalkers.org/images/show/923504