The gathering echoed what Gonzalez has expressed in social media posts and in an essay published last month in Harper’s Bazaar: “This started with, has been about, will always be for, all of us. And who are we? We are the people who died in the freshman building on Valentine’s Day at Douglas High, and the people who died in every mass shooting in U.S. history. We are everyone who has been shot at, grazed or pierced by bullets, terrorized by the presence of guns and gun violence in America.”