Terry Gross

Since 1994, Dr. Peter Piot been the director of the Joint United Nations Programme on HIV/AIDS and the executive director of U.N. AIDS, the U.N. agency coordinating the fight against the disease. He also co-discovered the Ebola virus. He's considered the U.N.'s top AIDS official. He says Asian countries need to take AIDS prevention and treatment more seriously, as they are only at the beginning of the epidemic. Countries most affected are Thailand, Myanmar and Cambodia. Piot says the HIV/AIDS epidemic has hit India very hard.

Photographer Joel Meyerowitz has spent the past month taking photographs of Ground Zero for the Museum of City of the New York archives. He had also been shooting pictures of the Manhattan skyline and the World Trade Center Towers since 1981. The last photo he took of the skyline was shot four days before the September 11 attacks. Several of these photos were recently featured in the New Yorker magazine. They'll also be on exhibit at the Ariel Meyerowitz Gallery in Manhattan beginning November 1st.

Journalist Charles Sennott of the Boston Globe. He just returned from Afghanistan. He is also the author of the new book, The Body and The Blood: The Holy Land Christians At the Turn of a New Millennium (PublicAffairs). Sennott was the Globe Middle East bureau chief, and is currently the Globe Europe bureau chief and lives in London.