*NPR reporter at Capitol Hill with update on suspicious letter to Senate Majority Leader Tom Daschle
*NPR Science Reporter in Boston with update in anthrax cases in U.S.
*Pulitzer Prize-winning journalist, historian
*Author of 17 books most recently War in a Time of Peace, (Scribner)
*Professor of American Studies, Cornell University, Ithaca, New York
*Sports Writer, The New York Times
President Bush has pledged the U.S. commitment to ending terrorism. The FBI is asking people to report any "unusual or suspicious activity." Americans are on high alert for additional terrorist attacks. In this hour of Talk of the Nation, Neal Conan talks with experts and reporters in Afghanistan and Pakistan about the latest developments in the war against terrorism.