The FBI on Tuesday joined the effort to get to the bottom of the water crisis in Flint, Michigan. A cost-cutting measure by a state-appointed city manager in April, 2014, took Flint off the Detroit pipeline which drew water from Lake Huron, the world's fifth largest freshwater lake, and moved to a different pipeline that led from the Flint River. Although residents began complaining immediately about the foul-tasting, discolored water, it was not until October, 2015, that the supply was switched back. In the meantime, the citizens of Flint were exposed to levels of lead that far exceeded standards of safety. Children are especially susceptible to lead poisoning, which can affect brain development. Questions have arisen over whether race and poverty contributed to the slow response to complaints, especially since it is now known that employees in state buildings were provided bottled water, and the General Motors plant quit using the Flint River water in a matter of months because it was corroding automobile parts. Visit the sites below to learn more about this crisis.