Ten years ago, Flint, Mich. switched water sources to the Flint River. The lack of corrosion control in the pipes caused lead to leach into the water supply of tens of thousands of residents. Pediatrician Mona Hanna-Attisha recognized a public health crisis in the making and gathered data proving the negative health impact on Flint's young children. In doing so, she and community organizers in Flint sparked a national conversation about lead in the U.S. water system that persists today.

Today on the show, host Emily Kwong and science correspondent Pien Huang talk about the state of Flint and other cities with lead pipes. Efforts to replace these pipes hinge on proposed changes to the EPA's Lead and Copper Rule.

Have questions or comments for us to consider for a future episode? Email us at shortwave@npr.org — we'd love to hear from you!

Flint Community Schools said it has concerns about the national landscape of gun violence across the nation. The ban went into effect Monday.

The dismissal for 7 people was significant but not a surprise after the Michigan Supreme Court earlier said a different judge acting as a one-person grand jury had no authority to issue indictments.

At least a dozen people died and more than 80 people fell ill after untreated water from the Flint River caused lead to leach from old pipes, poisoning the water system city residents relied on.

August marks two years since a police officer shot and killed 18-year-old Michael Brown in Ferguson, Missouri. Inequalities in our criminal justice...