TEDxYale is hosting its flagship conference, "Echoes," on Sunday, April 23. The event will take place from 12:00 to 4:00 pm in LC 102. Speakers at this year's conference include Américo Mendoza-Mori, Baseera Khan, David McCullough III, Dina Radenkovic, Emma Louden, Laura Zeng, Manojit Nandi, Masashi Kaneda, and Shaezmina Khan.