STEVE INSKEEP, Host:
We do not know all the facts surrounding a former FBI agent who's been missing but what we do know this morning is tantalizing enough. Robert Levinson disappeared four years ago while traveling in Iran. Now the State Department and members of his family say they have received what they call proof that he's alive. NPR's Mike Shuster has more.
MIKE SHUSTER: But Levinson's case has been unique. There has not been any information to emerge since his disappearance.
A: Mike Shuster, NPR News, Baghdad.
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