The Aspen Ideas Festival brings together change-makers -- from singers and scientists to students and Nobel Prize winners -- to share ideas about what's shaping our world: the opportunities, the challenges, and finding common ground. Graham Veysey is the festival's executive director and executive producer. Tina Brown is an award-winning journalist, editor and author who is guest-curating the event. They spoke with Chandra Thomas Whitfield as the festival marks 20 years.
