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
Iranian President Hassan Rouhani (second right) listens to head of the Atomic Energy Organization of Iran Ali Akbar Salehi while visiting an exhibition of Iran's new nuclear achievements in Tehran on Saturday. Iranian Presidency Office via 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
The International Atomic Energy Agency has been responsible for policing the Iran deal. It has sealed some equipment, preventing its use, and installed cameras and other electronic monitoring. AFP/IRNA/AFP via Getty Images hide caption
Ayatollah Ali Khamenei, Iran's supreme leader, speaks during a meeting with military commanders in Tehran on Sunday. Office of the Iranian Supreme Leader via AP hide caption
Iran announced Sunday that it will no longer limit its enrichment of uranium under the terms of the 2015 nuclear deal. Iranian Foreign Minister Mohammad Javad Zarif is seen here in Tehran in September 2019. Atta Kenare/AFP via Getty Images hide caption
The head of Iran's parliament, Ali Larijani, speaks with NPR's Steve Inskeep in New York on Thursday. Larijani addressed the recent nuclear agreement between world powers and Iran. Bryan Thomas for NPR hide caption
President Obama meets Saudi King Salman bin Abdul Aziz in Riyadh in January. The president is hosting King Salman at the White House Friday. Carolyn Kaster/AP hide caption
The state-run Iran-Khodro plant manufactures vehicles including the Peugeot 206 car, shown on a production line in 2014 near Tehran. Iran's robust auto industry was built in response to sanctions. Ebrahim Noroozi/AP hide caption
Sec. State John Kerry spoke with NPR's Steve Inskeep at the State Department. Kainaz Amaria/NPR hide caption
The U.N. Security Council endorsed the historic Iran nuclear deal on Monday. Now, world leaders — notably in the U.S. and Iran — must garner enough support for the agreement at home. Seth Wenig/AP hide caption
Israeli Prime Minister Benjamin Netanyahu speaks during a press conference at his Jerusalem office on Tuesday. Oren Ben Hakoon/AP 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
Prolonged nuclear talks gave Russian journalists time to play a game of giant chess Wednesday in a courtyard of the Beau-Rivage Palace Hotel in Lausanne, Switzerland. Brendan Smialowski/AP hide caption
Ahead of Tuesday's deadline, Secretary of State John Kerry, Russian Foreign Minister Sergei Lavrov, German Foreign Minister Frank-Walter Steinmeier, French Foreign Minister Laurent Fabius and Chinese Foreign Minister Wang Yi wait Monday for the opening of a plenary session on Iran's nuclear program at the Beau-Rivage Palace Hotel in Lausanne, Switzerland. Fabrice Coffrini/AFP/Getty Images hide caption
German Foreign Minister Frank-Walter Steinmeier, left, and Secretary of State John Kerry meet during closed-door nuclear talks with Iran in Vienna Saturday. Ronald Zak/AP hide caption
Iranian Foreign Minister Mohammad Javad Zarif. More talks "in a few weeks," he says. Jason DeCrow/AP hide caption
Ayatollah Ali Khamenei. Office of the Supreme Leader (Iran)/AP hide caption
Vice President Joe Biden speaks during the Security Conference in Munich, Germany, on Saturday. Matthias Schrader/AP hide caption