This week on Matter of Fact, we look at what it means to be an American. Correspondent Jessica Gomez set off on a road trip from Denver to St. Louis to listen to how people feel about their American identity. Plus, Special Contributor Ray Suarez shares the story of one of the most important contributions from immigrants: the building of the transcontinental railroad. And, Pulitzer-prize winning journalist Nikole Hannah Jones shares what inspired her work on the New York Times’ 1619 Project.