In April 2014, the fateful decision was made to change Flint's drinking water source to the Flint River.
That led to what is known world-wide as the Flint water disaster.
But it took activist citizens like Lee Anne Walters working with Virginia Tech engineer Marc Edwards to rip apart layers of denial and stonewalling from state and Environmental Protection Agency officials.
In 2001, Edwards proved that people in Washington D.C. were drinking lead-poisoned water after the city changed water treatment chemicals. So, when Walters and other worried Flint residents called, he answered.
They joined us today, a year after the city officially declared a state of emergency.