9/11

National security expert Loch Johnson. Hes written several books about intelligence and the trade-off of personal freedom, including Bombs, Bugs, Drugs and Thugs: Intelligence and Americas Quest for Security. Johnson is a professor of political science at the University of Georgia. He has served on several US Senate committees on Intelligence.

Since September 11th, Joel Meyerowitz has taken over 7000 photographs of Ground Zero. He gained unlimited access to the site and did so in conjunction with the Museum of the City of New York. A selection of those pictures can been seen in the May 20th issue of The New Yorker.

Architecture critic for The New Yorker Paul Goldberger discusses the different ideas for what to do with the site of the World Trade Center.

Writer and retired New York city firefighter Dennis Smith arrived at the site of the World Trade Center towers on the day of the attacks to volunteer with the rescue effort. His new book Report from Ground Zero (Viking) is composed of first-person testimony of rescuers who were there when the towers were attacked and fell, and who helped in the efforts afterwards. Smith spent 18 years with the fire department. He is the author of nine books, including the bestseller Report from Engine Co. 82 about his years in the city's most dangerous and active firehouse.

In honor of the six-month anniversary of Sept. 11, 2001, Meyerowitz talks about his World Trade Center Archive Project, a traveling State Department-sponsored exhibition of Ground Zero photographs. Meyerowitz originally spoke about his World Trade Center photos when he was a guest on Fresh Air on October 23, 2001.

T.V. critic David Bianculli previews the CBS special 9/11,which airs Sunday at 9:00 ET/PT. Filmmakers Jules and Gedeon Naudet captured footage of the collapse of the World Trade Center from the inside. Robert DeNiro narrates the special.

Reverend Christopher Keenan is the Chaplain of the Fire Department of New York. He succeeds the Rev. Mychal Judge, who was killed on September 11th 2001 when hit by falling debris at the World Trade Center. Keenan is a Franciscan friar who was born in New York City. In the 80s, he established hospices for AIDS patients, and more recently, he's worked with the homeless.

Writer William Langewiesche is a national correspondent for The Atlantic Monthly. He writes about recovery and cleanup efforts at the World Trade Center in his new book, American Ground: Unbuilding the World Trade Center (North Point Press). Langewiesche arrived at the scene days after the collapse and had unrestricted, round-the-clock access to events there.

Professor Robert Jay Lifton specializes in the study of extremist religions and cults. Hel talk with us about John Walker, the American captured in Afghanistan fighting for the Taliban. Lifton is Distinguished Professor of Psychiatry and Psychology at the Graduate School University Center and Director of The Center on Violence and Human Survival at John Jay College of Criminal Justice at The City University of New York. He written books on many topics, including the Japanese cult which released poison gas in the Tokyo subways, Nazi doctors, Hiroshima survivors and Vietnam vets.

Peter Bergen is a former correspondent/producer and current terrorism consultant for CNN, and the author of the book Holy War Inc.: Inside the Secret World of Osama bin Laden. (The Free Press) It both a biography of Bin Laden and an explanation of bin Laden global network. While at CNN, Bergen produced bin Laden first TV interview, filmed at his mountain hideout in Afghanistan. Bergen has written about Islamist militant groups for The New Republic, London Daily Telegraph and The Washington Times.