Terry Gross

Curator of Herpetology in the Museum of Vertebrate Zoology, Harry Greene and Professor of Integrative Biology at the University of California. He has a new book on snakes (with photographs) "Snakes: The Evolution of Mystery in Nature." (University of California Press)

Henry Foster Jr., M.D. is Senior Advisor to President Clinton on Teen Pregnancy Reduction and Youth Issues. He founded the I Have a Future program to encourage at-risk youth to stay in school, and to build self-esteem. Foster was nominated by Clinton to be U.S. Surgeon General but his nomination was withdrawn because of controversy over Foster's record on abortion. He has a new book, "Make a Difference." (Scribner)

Commissioner for New York's Child Welfare Agency, the Administration for Children's Services Nicholas Scoppetta. He recently called for an expansion of foster care for the city's children, including "neighborhood based" care. Scoppetta understands well the struggles of children in foster care. As a five year old boy, he was taken out of his home in New York's Little Italy for neglect, and lived in several foster institutions for six years.