>> and the full extent of the disaster remains unknown. >> the first time that a major spill has happened with this material. >> and this environmental catastrophe is all caught on camera. october 4th, 2010. at an aluminum plant in hungary, a breach in the wall of a containment dam releases 35 million cubic feet of toxic, red sludge. >> when the red mud was released, it created a flood that moved in the valley extremely rapidly. >> boxite residue, traditionally known as red mud, is a byproduct of the aluminum creation process. to dispose of this red mud, it is normally dried and then covered with soil and grass. but today, it pours down on hundreds of unsuspecting citizens. the unstoppable rush of waste hits one town particularly hard. >> a tsunami-like wave moved on the valley and rose to a height