IDEA Labs, the university-based technology and innovation incubator that originated at Washington University in St. Louis, hosted a National Demo Day at CIC St. Louis Monday, April 25, 2016. Presenters pitched their ideas and companies during both poster sessions and as part of presentations that preceded a keynote address by MIT Institute Professor Robert Langer, PhD. Brett Gao, of the St. Louis IDEA Labs committee, talks with Robert Langer, PhD, before presentations begin. Photo by Sid Hastings © copyright 2016 Washington University.