Every year since 1970, groups of Native Americans have been gathering in Plymouth, Massachusetts, on Thanksgiving Day to mark a National Day of Mourning. They honor their ancestors and march to remember “the genocide of millions of Native people, the theft of Native lands and the erasure of Native cultures.” Over the years, the event has also stood in solidarity with other Indigenous struggles around the world. The World’s Sara Hassan observed the gathering last year and recently spoke with some of the organizers.