Elton John tells Fresh Air's Terry Gross that The Diving Board is "a very adult album." Joseph Guay/Courtesy of the artist hide caption

itoggle caption Joseph Guay/Courtesy of the artist

Vijay Iyer is on faculty at New York University, The New School and the School for Improvisational Music. Jimmy Katz hide caption

itoggle caption Jimmy Katz

Jeremy Denk has recently written for The New Yorker and The New York Times Book Review. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

In this 2011 photo, American-born Islamist militant Omar Hammami, right, sits with al-Shabab deputy leader Sheikh Mukhtar Abu Mansur Robow during a press conference in Somalia. Farah Abdi Warsameh/AP hide caption

itoggle caption Farah Abdi Warsameh/AP

Liberace sits at a gold-leafed piano in the living room of his then-new Hollywood mansion in November 1961. Keystone Features/Getty Images hide caption

itoggle caption Keystone Features/Getty Images

Billie Jean King, seen here in 1977, learned to play tennis on the public courts near her Long Beach, Calif., home. Kathy Willens/AP/Press Association Images hide caption

itoggle caption Kathy Willens/AP/Press Association Images

Danny (Chris Messina) and Mindy learn that medicine isn't all fun and games. Beth Dubber/Fox hide caption

itoggle caption Beth Dubber/Fox