Iranian Foreign Minister Javad Zarif (center) with U.S. Secretary of State John Kerry in Lausanne, Switzerland, after talks over Iran's nuclear program wrapped up in April. Brendan Smialowski/AP hide caption

itoggle caption Brendan Smialowski/AP

Family members of Americans held or missing in Iran attend a hearing of the Foreign Affairs Committee on Capitol Hill on Tuesday. From left: Ali Rezaian, brother of Washington Post journalist Jason Rezaian; Nagameh Abedini, wife of Saeed Abedini; Sarah Hekmati, sister of Amir Hekmati; and Daniel Levinson, son of Robert Levinson. Brendan Smialowski/AFP/Getty Images hide caption

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Samuel LaHoz/Intelligence Squared U.S.

A 2013 photo shows Washington Post reporter Jason Rezaian and his wife, Yeganeh Salehi, a correspondent for the Abu Dhabi-based newspaper The National. Both of them were in an Iranian court Tuesday. Vahid Salemi/AP hide caption

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President Obama tells The Atlantic that the loss of Ramadi to the self-declared Islamic State is a "setback," but he denies the U.S. is losing to the group. Kathy Willens/AP hide caption

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President Obama sits with Kuwaiti Emir Sheikh Sabah Al-Ahmad Al-Sabah, left center, Secretary of State John Kerry, right center, and other Gulf Cooperation Council leaders and delegations at Camp David, Md., on Thursday. Pablo Martinez Monsivais/AP hide caption

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Senate Foreign Relations Committee Chairman Sen. Bob Corker, R-Tenn., center, and the committee's ranking member Sen. Ben Cardin, D-Md., right, were all smiles April 14 after the committee passed an agreement on oversight of Iran negotiations. But the bill has run into some outspoken opponents in the full Senate. Andrew Harnik/AP hide caption

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Saudi King Salman (center) appears alongside then-Crown Prince Muqrin bin Abdulaziz (third from left) and then-deputy Crown Prince and Interior Minister Mohammed bin Nayef (left) in January. Muqrin has since been pushed aside to make way for Mohammed. Saul Loeb/AFP/Getty Images hide caption

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Jason Rezaian, an Iranian-American correspondent for the Washington Post, faces four serious charges, including espionage, according to his lawyer. He's shown in 2013. Vahid Salemi/AP hide caption

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Senate Foreign Relations Committee member Sen. Marco Rubio, R-Fla., questions Secretary of State John Kerry on Capitol Hill last month. In an interview with NPR, Rubio reiterated his opposition to President Obama's dealings with Iran and Cuba. Pablo Martinez Monsivais/AP hide caption

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Iranian Supreme Leader Ayatollah Ali Khamenei, seen here in a photo released by his official website Thursday, stopped short of giving his endorsement to the framework nuclear deal struck last week. AP hide caption

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President Obama speaks to NPR's Steve Inskeep at the White House on Monday. The president is pressing hard for a full-fledged nuclear agreement with Iran, part of his outreach to states that previous presidents ostracized for decades. Maggie Starbard/NPR hide caption

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NPR's Morning Edition host Steve Inskeep interviews President Obama at the White House on Monday. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Iranian oil workers gather at an oil refinery south of the capital Tehran, Dec. 22, 2014. Iran's oil exports have been crippled by sanctions. Vahid Salemi/AP hide caption

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"Let Diplomacy Work" was spelled out near the Capitol by liberal, anti-war group MoveOn.org earlier this week. Larry French/Getty Images hide caption

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