After September 11th, David Paine and Jay Winuk had an idea: transform a day of tragedy into one defined by service. Nearly 25 years later, 9/11 Day has become one of America’s largest day of service, engaging tens of millions of people and helping establish September 11th as a federally recognized National Day of Service. David and Jay share the personal story behind the movement, the long road from an idea to federal legislation, how they built a sustainable model with nonprofits, businesses, and government, and what 25 years have taught them about service, unity, and our shared humanity.