On this week's "America Changed Forever," America observes its newest federal holiday, Juneteenth, signed into Federal law by President Biden Thursday. Host Jeff Pegues is joined by Dr. Rodney Coates of Miami University, who breaks down the history of the holiday. Michael Harriot of The Root-dot-com, Washington Post Michelle Singletary, and Mary Elliot, a curator at the National Museum of African American History and Culture.