Trump has named Robert C. O’Brien as national security adviser. O’Brien had served as presidential envoy for hostage affairs and has a long background in diplomacy. NPR’s Greg Myre joins us to discuss. Also, this year marks 400 years since the first enslaved Africans arrived on America’s shores. Tonya Mosley speaks New York Times journalist Nikole Hannah-Jones, who spearheaded the 1619 Project, a collection of essays dedicated to chronicling slavery and revealing its ties to America’s modern systems and cultural norms.