A 7th grader developed a device that tests water for dangerous chemicals like lead. Gitanjali Rao is 11 years old and she's America's top young scientist. Her invention, called Tethys, after the Greek goddess of fresh water, can be used through an app on your phone. Her idea stems after studying major water crises like what happened in Flint, Michigan. InsideEdition.com's Leigh Scheps (http://twitter.com/LeighTVReporter) has more.