Terry Gross

Journalist Jon Cohen writes for Science Magazine. He just got back from the 14th International AIDS conference where he reported on the AIDS vaccine and anti-HIV drug therapies. His article "Designer Bugs" in the July/August edition of The Atlantic Monthly is about how scientists have the ability to create synthetic viruses in the lab, like mousepox and polio, and the controversies and dangers this presents.

Leo Litwak is a retired San Francisco State University professor of English. He's the author of the new memoir, The Medic: Life and Death in the Last Days of World War II (Penguin Books). Litwak was a 19-year-old medic. One reviewer writes, "[A] book that should be given to every schoolboy in the country at the age of 13... the Medic teaches us so much, makes clear that sometimes the monsters in war are not only the enemy."

Professor of Islamic law at the University of California at Los Angeles Khaled Abou El Fadl. He's the author of a number of books, including Conference of the Books: The Search for Beauty in Islam (University Press of America), a collection of essays about the problems and challenges that confront Muslims in the contemporary world.