The implementation of the Iranian nuclear deal and five Americans freed by Tehran in a prisoner swap are reasons for optimism, President Obama said Sunday during a rare weekend address, showing the fruits of diplomacy with a still-hostile adversary of the United States.<br />"This is a good day," the president said.<br />"Once again, we’re seeing what’s possible with strong American diplomacy."<br />Four U.S. citizens freed by Iran -- including Washington Post reporter Jason Rezaian -- were released Sunday, according to a senior administration official and their families.<br />A fifth American, Matthew Trevithick, had already left the country.<br />“They never gave in and they never gave up,” Obama said of the Americans, some of whom reportedly experienced torture in years-long detentions.
