You want an example of something toxic? Take a look over my shoulder here. That red sludge spilled out of a reservoir at an aluminum plant on Monday. This happened in the European nation of Hungary. This stuff is toxic. Around 250 people had to leave their homes. The spill is being blamed for the deaths of four people. Yesterday, the sludge reached the Danube, the second largest river in Europe. Nic Robertson takes us on a tour of one of the villages that this toxic sludge swept through.