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This undated handout photo provided by the family of Robert Levinson, shows retired-FBI agent Robert Levinson. Levinson, 64, went missing on the Iranian island of Kish in March 2007. Levinson's family received these photographs of him in April 2011. U.S officials suspect the Iranians or its proxies are holding Levinson hostage. (AP Photo/Levinson Family)

Ex-FBI agent missing in Iran

Robert Levinson, a retired FBI agent, traveled to the Iranian island of Kish as a private investigator on March 8, 2007. He hasn’t been seen publicly since he went missing the following day. March 9, 2013 marks the sixth anniversary of Levinson’s disappearance.