The FBI says it thwarted a terrorist attack on New York, but some critics argue that the plot was all talk. They ask: where's the crime. It's part of an ongoing debate over pre-emptive arrests.
Eric Lipton, metro reporter, The New York Times; winner of a 1992 Pulitzer Prize.
Bruce Ackerman, Sterling Professor of Law and Political Science, Yale University
John Zwerling, defense attorney
John Miller, assistant director, Office of Public Affairs, FBI