Terry Gross

Psychiatrist Robert Jay Lifton is an expert on terrorism and cult groups. He the author of the book, Destroying the World to Save It: Aum Shinrikyo, Apocalyptic Violence, and the New Global Terrorism about the Japanese cult group that released sarin nerve gas in the Tokyo subways. Lifton will soon join the Harvard faculty as a visiting professor.

Singer and songwriter Loudon Wainwright III. He has a new CD, Last Man on Earth and a new role on the hit FOX TV series, Undeclared. He plays a dysfunctional father on the show. Loudon Wainwright III grew up in the town of Bedford in wealthy Westchester County north of New York City. He became a folk singer/songwriter in the late '60s, singing humorous and autobiographical songs. In 1972, on his Album III he scored the top-40 hit "Dead Skunk." Many of his songs have been featured on NPR Morning Edition.

Professor of structural engineering at the University of California at Berkeley, Abolhassan Astaneh-Asl. He is a member of a team assembled by the American Society of Civil Engineers to investigate the World Trade Centers site. He recently received a grant from the National Science foundation to study the remains of the at the site. His findings will be used in engineering studies to help improve the structural integrity of buildings. Astanneh also has done research on bomb-resistant designs, following the bombing of the Oklahoma Federal Building.