Terry Gross

John Prendergast is the co-director of the Africa Program for the International Crisis Group. He's the author of the book God, Oil, and Country; Changing the Logic of War in Sudan. Before joining ICG, he was a special advisor to the U.S. State Department, where he worked on a number of issues, including Sudan policy.

Dr. Rowan Gillies is the International President of Midecins Sans Frontihres (Doctors Without Borders). He is a medical doctor and surgeon from Sydney, Australia. Dr. Gilles began working with Doctors Without Borders in 1998 as a field doctor in Afghanistan. Since then he has worked with the organization in Sierra Leone, South Sudan and Liberia. He recently returned from Sudan.

Dr. Jerry Avorn is a Harvard Medical school researcher and clinician. His new book, Powerful Medicines, uses patient vignettes, scientific critique and statistics to examine the benefits and side effects of prescription drugs.

Ross McElwee has made a career out of filming his life. He's made seven feature-length documentaries, including Sherman's March, Time Indefinite, Something to Do with the Wall and Six O'Clock News. His latest film is Bright Leaves about his family's connection to the tobacco industry. His great-grandfather created the brand of tobacco known as Bull Durham. McElwee is a visiting lecturer at Harvard University's Department of Visual and Environmental Studies.

James Bennet just completed his 3-year stint as Jerusalem bureau chief for The New York Times. He wrote the cover story for this week's New York Times Magazine: "A Nation Unto Himself: Where is Ariel Sharon Leading Israel?"

McLagan played with the first generation of British rockers, handling keyboards for both the Small Faces and Faces, led by vocalist Rod Stewart and guitarist Ron Wood. McLagan produced a new box set of Faces recordings, Five Guys Walk Into a Bar.

Republicans in Illinois have asked Alan Keyes to run against Barack Obama for the U.S. Senate. Keyes, a resident of Maryland, has served in a number of government posts, including U.S. ambassador to the United Nations economic and social council and assistant secretary of state for international organizations. He also hosted his own radio show.

Obama, an Illinois state senator, is considered the party's rising star. He is currently running against Republican Alan Keyes for a seat in the U.S. Senate. Obama's keynote address at the Democratic National Convention brought him to the attention of many Americans. He talks about the race and his memoir, Dreams From My Father: A Story of Race and Inheritance.

Her new film Stander is based on the true story of Andre Stander, a young white policeman in Johannesburg, South Africa, who in the 1970s became a notorious bank robber.

Journalist Jon Cohen recently finished a four-part series on HIV and AIDS in Asia for the Science Magazine. In researching the series, he traveled to six countries and talked to doctors, patients, public health officials, sex workers and drug users. Cohen has been writing about the AIDS epidemic for 15 years. His book on the search for a vaccine is called Shots in the Dark.