On June 19th, 1865, federal troops arrived in Galveston, Texas to ensure that all enslaved people were freed, ushering in the end of slavery. This week, Congress made it a national holiday. On Today's Show: Clint Smith, staff writer at The Atlantic, award winning poet, and author of How the World is Passed: A Reckoning with the History of Slavery Across America (Little, Brown and Company June 1, 2021), leads listeners through a tour of U.S. monuments and landmarks that explain how slavery has been central in shaping our history.