The federal grand jury investigating the leak of the identity of an undercover CIA agent is set to expire in nine days. It's currently unclear whether special prosecutor Patrick Fitzgerald will ask that anyone be indicted, or, if he does, who, and on what charges. We take a look at the inside workings of a federal grand jury.

Guests:

David Folkenflik, NPR media correspondent

Tom Rosenstiel, director, Project for Excellence in Journalism; vice chairman, Committee of Concerned Journalists, Washington, D.C.

Michael Duffy, Time magazine's assistant managing editor

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