An estimated 185 million gallons of toxic sludge spewed out of a break in a reservoir at an alumina refining plant in Ajka, Hungary, leaving a path of destruction and havoc in its wake. At least four people were reported dead and 120 injured as the Hungarian government declared a state of emergency in the area. Though the European Union does not classify the sludge as toxic waste, people who came into contact with the caustic substance describe being burned through their clothing. Officials are worried about the environmental impact of the flood, especially should the sludge come into contact with the Danube River. Julian Siddle of the BBC has been following the story and joins the program with the latest.