Terry Gross

The United Nations High Commissioner for Human Rights Mary Robinson. She is also former President of Ireland. Robinson visited Sierra Leone recently. She warned that the United Nations will not recognize the amnesty, brokered in the peace accord, as applying to gross violations of human rights.

Birder and naturalist Scott Weidensaul author of "Living on the Wind" (North Point Press) discusses the habits of migratory birds, what makes them do what they do, and how they're able to do it.

Julia Ericksen is the author of the new book "Kiss and Tell: Surveying Sex in the Twentieth Century" (Harvard University Press). Ericksen is Associate Professor of Sociology at Temple University.