Harold Harrington is a master plumber. Fixing people's pipes is what he does. But it was something he found in his own home in Flint, Mich., that disturbed him.
"This came out of my house," Harrington says as he holds a small piece of pipe. "This piece of galvanized was in my basement. It fed my upstairs faucet and this is out of my upstairs bathroom. ... It's full of lead."
Harrington is among the tens of thousands of residents of Flint whose contaminated drinking water cast a spotlight on a threat faced by communities across the United States.