Senator Joe Lieberman (I-Conn.) has called for Americans charged with terror crimes to be stripped of their citizenship. However, there's no precedent for stripping an American of his or her citizenship and the law says that the U.S. cannot use the revocation of citizenship as punishment. The issue is murky and we turn to Peter Spiro, a professor of law at Temple University and Dr. Azima Khan, an immigrant from Pakistan who recently received her citizenship, join us to talk about the case.

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