Robert Wood family `` constantly praying for his return , '' wife says . The State Department disappeared March 8 , 2007 during trip to Iranians island . Iranian say they have no knowledge of missing man 's whereabouts . Iranian claim is widely doubted in the United States .
Robert Levinson 's family `` constantly praying for his return , '' wife says . Levinson disappeared two years ago during trip to Iranian island . Iranians say they have no knowledge of missing man 's whereabouts . Iranian claim is widely doubted in the United States .