John Dickerson reports on the challenge to colleges and students as the institutions prepare to reopen in the fall amid the still-present pandemic; produced by Draggan Mihailovich. History has largely ignored the Greenwood Massacre, a two-day assault in 1921 on a thriving black community in Tulsa, Okla., in which an estimated 300 people – mostly African American men, women and children – were killed. Scott Pelley reports on a community trying to uncover the facts and the bodies in what’s been called the worst race riot in American history; produced by Nicole Young. The Merit Systems Protection Board gives two million federal civil service workers – including whistleblowers – a place to appeal should they be disciplined, demoted or fired. As Norah O’Donnell reports, the board now has a backlog of nearly 2,900 cases, because of the failure of the Senate to confirm any new members to the board in over eight years; produced by Keith Sharman and Alex J. Diamond.