Head of the International Atomic Energy Agency Rafael Mariano Grossi, left, and Iranian Foreign Minister Hossein Amirabdollahian pictured meeting in Tehran, on Tuesday. Grossi pressed for greater access in the Islamic Republic ahead of diplomatic talks restarting over Tehran's tattered nuclear deal with world powers. Vahid Salemi/AP hide caption
A staff person removes the Iranian flag from the stage after a group picture with representatives of the United States, Iran, China, Russia, Britain, Germany, France and the European Union during the Iran nuclear talks in July 2015 in Vienna. Carlos Barria/Pool/AFP via Getty Images hide caption
Attendees hold signs and cheer during a Tea Party Patriots rally against the Iran nuclear deal in Washington, D.C., on Sept. 9, 2015. Pete Marovich/Bloomberg via Getty Images hide caption
NPR's Steve Inskeep interviews President Obama at the White House about the Iran nuclear deal. Kainaz Amaria/NPR hide caption
Sec. State John Kerry spoke with NPR's Steve Inskeep at the State Department. Kainaz Amaria/NPR hide caption
A satellite image shows the Fordow facility in Iran. Under an agreement with six world powers, Iran would stop enriching uranium at the facility. DigitalGlobe/Getty Images hide caption
Iranian hard-liners hang petitions from the Azadi (Freedom) Tower in Tehran during a June 30 demonstration demanding a "good deal" in the nuclear negotiations between Iran and six world powers. Negotiators announced a deal Tuesday morning in Vienna. Vahid Salemi/AP hide caption
President Obama is pressing hard for a nuclear agreement with Iran. But critics have cited his remark that Iran's 'breakout' time for acquiring nuclear material for a bomb might be very brief as parts of the deal expire. Maggie Starbard/NPR hide caption
Sen. Bob Corker, R-Tenn., chairman of the Senate Foreign Relations Committee, will shepherd bills on Congress' reaction to the Iran framework deal struck by President Obama. J. Scott Applewhite/AP hide caption
In an interview with NPR's Morning Edition host Steve Inskeep, President Obama said Wisconsin Gov. Scott Walker is advocating a "foolish approach" to Iran and that he should "bone up on foreign policy." Mito Habe-Evans/NPR hide caption
President Obama about to walk out into the Rose Garden at the White House to announce the framework of a nuclear deal with Iran. Nicholas Kamm/AFP/Getty Images hide caption
U.S. Secretary of State John Kerry (left) and Iranian Foreign Minister Mohammad Javad Zarif (right) at a meeting Wednesday in Lausanne, Switzerland. Brian Snyder/AP hide caption
U.S. Secretary of State John Kerry goes for a stroll along the shore of Lake Geneva on Sunday prior to renewed nuclear negotiations in Geneva with his Iranian counterpart. Fabrice Coffrini/AFP/Getty Images hide caption