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Retired FBI agent Robert Levinson has been missing since 2007. His family says he was working as a private investigator in Iran when he disappeared. It's believed Levinson, now 64, is being held captive somewhere in southwest Asia.
Retired FBI agent Robert Levinson has been missing since 2007. His family says he was working as a private investigator in Iran when he disappeared. It's believed Levinson, now 64, is being held captive somewhere in southwest Asia.

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    The mysterious disappearance of Bob Levinson

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The mysterious disappearance of Bob Levinson

Where is Bob Levinson? Iran claims that it doesn't know. CNN's Brian Todd reports.

The mysterious disappearance of Bob Levinson

Where is Bob Levinson? Iran claims that it doesn't know. CNN's Brian Todd reports.