More than 100 people were killed and thousands more left injured or homeless when a dam in West Virginia’s rural Buffalo Creek Valley gave way. It had been built out of sediment left over from coal mining and collapsed after a heavy rainfall, sweeping away two more dams in its path. The collapse unleashed approximately 130 million gallons of black waste water onto the residents of the valley below. A study done 17 years later found that residents still suffered what lasting psychological effect? Discuss
Source: The Free Dictionary