The Washington Post reports a House committee heard testimony Tuesday from the brother of a Washington Post journalist held in Tehran and relatives of three other Americans imprisoned or unaccounted for in Iran. The accounts of the relatives comes at a critical time in the Iran nuclear talks. Negotiators for Iran and six world powers, led by the United States, are racing to make a deal before a temporary accord expires on June 30. At the hearing before the House Foreign Affairs Committee, at least one of the American relatives urged negotiators to be more aggressive in demanding Iran take action before a nuclear deal is sealed. The son of Robert Levinson, a former FBI agent who went missing in 2007 on the Iranian island of Kish, said in prepared testimony that he is encouraged by the 2013 election of Iranian President Hassan Rouhani and by his government’s engagement with the United States.