When the state of Michigan decided to save some money by switching the city of Flint's water supply from Lake Huron to the Flint River, they ended up exposing the city to lead. The Flint River is highly corrosive -- 19 times more so than Lake Huron. Lead began leaching into the water supply, and residents complained of brown, murky water. Now, the governor has declared a state of emergency, and the National Guard is on the scene to aid residents seeking clean drinking water.
Some have taken to calling the crisis "Watergate."