Sen. Joe Lieberman, the Independent from Connecticut, is a leading voice in the Senate in favor of aggressive action against Iran.
Last week, the U.S. imposed sanctions on three major Iranian banks to target the Revolutionary Guards, and there is growing anxiety in Washington and Tehran that the White House is gearing up for an attack.
Lieberman talks with Robert Siegel about what tools he thinks the U.S. has in its arsenal to deal with the regime.
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