When it comes to innovation, two local high school students are proving they are more than up to the challenge. They are among just 126 students from across the country who will be recognized at the first-ever national STEM Festival in Washington, D.C. being co-presented by "EXPLR" and the U.S. Department of Education. Demonstrating their inventions on the FOUR were Sarah Gao and Leanne Fan. View more FOUR segments here: https://www.cbs8.com/four