The family of Robert Levinson , the ex-FBI agent who vanished in Iran in 2007 and is believed to have died in Iranian custody, is calling on the U.S. government to ensure any nuclear deal with Tehran includes the return of his remains. The family issued a statement on X provided to Fox News correspondent Jennifer Griffin following the confirmed killing of Ayatollah Ali Khamenei, the Supreme Leader who oversaw the regime the family holds responsible for Levinson's kidnapping, detention, and