By CNN Foreign Affairs Correspondent Jill Dougherty
With a breakthrough interim nuclear deal and relations between the United States and Iran improving, the White House on Tuesday "respectfully" asked the Iranian government to help return Robert Levinson, a retired FBI agent who went missing in Iran more than six years ago.
"We do want to test the regime. The new administration has said that they want to take a different approach toward the West, toward the United States. One way that they could clearly demonstrate that is they could help us find Bob Levinson, help reunite him with his family," Deputy National Security Adviser Ben Rhodes told CNN.