_J.K. Rowling, author of the best-selling Harry Potter book series, delivers her Commencement Address, “The Fringe Benefits of Failure, and the Importance of Imagination,” at the Annual Meeting of the Harvard Alumni Association.

_At 18, Natalie Warne’s work with the Invisible Children movement made her a hero for young activists. At TEDxTeen she uses her inspiring story to remind us that no one is too young to change the world.