IN DEBT – Lilia Luciano looks at the world of student loan debt and the sticker shock many students face upon graduation.ON DISPLAY – Rita Braver visits Washington, D.C.'s Hirshhorn Museum and Sculpture Garden, which is turning 50 this year.THE LIGHT OF BATTLE – David Martin reports on the moments just before Allied forces invaded Normandy, France, 80 years ago, when victory was anything but assured.GRIFFIN DUNNE – Kelefa Sanneh talks with actor and director Griffin Dunne, who has a new book about life in his famous family.IN CONVERSATION – JULIA LOUIS-DREYFUS – Natalie Morales of 48 HOURS and THE TALK catches up with actor Julia Louis-Dreyfus to discuss her career and her new film.ROCTOGENARIANS – Mo Rocca introduces us to some inspiring "Roctogenarians," the high-achieving people of a certain age who are the subject of his new book.LIONEL RICHIE – Tracy Smith talks with legendary singer-songwriter Lionel Richie about his work creating "We Are the World," which was released 39 years ago.SEARCH HISTORY – David Pogue talks with the creator of the Wayback Machine, an archive of the internet.