AdvertisementTroubled By Flint Water Crisis, 11-Year-Old Girl Invents Lead-Detecting DeviceOctober 20, 2017Laurel WamsleyfacebookEmailGitanjali Rao, 11, says she was appalled by the drinking water crisis in Flint, Mich. — so she designed a device to test for lead faster. She was named "America's Top Young Scientist" on Tuesday at the 3M Innovation Center in St. Paul, Minn. (Discovery Education 3M Young Scientist Challenge)