A mudslide that caused the collapse of a house in a small German town was caused by an underground factory, Der Spiegel reported Monday. According to the report, a local investigator found evidence that the factory was owned by the Nazi regime. The mudslide took place during a slew of thunderstorms that hit Europe in July of 2009. On a particularly stormy night the banks of an artificial lake in Nachterstedt gave way, causing a home to plummet 100 meters and killing three