MR. PRESIDENT – Robert Costa sits down with President Biden to discuss his decision not to seek reelection, the country, and more. This is Mr. Biden's first interview since announcing his decision.HORSESHOE CRABS – Conor Knighton reports on the life and impact of the mysterious horseshoe crabs.IN CONVERSATION: ZOË KRAVITZ – Michelle Miller, co-host of CBS SATURDAY MORNING, catches up with Zoë Kravitz to talk about her new film, which stars her fiancé, Channing Tatum.A SUMMER SONG: POST MALONE – Anthony Mason talks with singer-songwriter Post Malone, who hit big in pop and is now breaking into country music.ON BROADWAY – Tracy Smith talks with actors Carol Burnett and Sutton Foster, who each have had the lead in Broadway's "Once Upon a Mattress," some 60 years apart.FINE PRINT: JAMES BALDWIN – Kelefa Sanneh looks at the life of author James Baldwin, who would have turned 100 this month.92ND STREET Y – Faith Salie reports on the history and impact of New York's famed cultural center, the 92nd Street Y.COMMENTARY – Jim Gaffigan has – quite literally – some corny thoughts.