Nuclear disarmament

FILE - In this Jan. 15, 2018, file photo, Pope Francis holds a photo of U.S. photographer Joseph Roger O'Donnell of child victims of Nagasaki bombing, aboard his flight to Santiago, Chile. The Vatican said Friday, Sept. 13, 2019, Pope Francis will visit Thailand and Japan on Nov. 19-26. (AP Photo/Alessandra Tarantino, File)

In this photo released by the office of the Iranian Presidency, President Hassan Rouhani speaks in a cabinet meeting in Tehran, Iran, Wednesday, Sept. 4, 2019. Rouhani reiterated a threat that Tehran would take additional steps away from the 2015 nuclear accord on Friday and accelerate its nuclear activities if Europe fails to provide a solution, calling it Iran's third, "most important step" away from the deal. (Iranian Presidency Office via AP)

FILE - In this April 9, 2018 file photo, President Donald Trump, left, shakes hands with national security adviser John Bolton in the Cabinet Room of the White House in Washington at the start of a meeting with military leaders. Trump has fired national security adviser John Bolton. Trump tweeted Tuesday that he told Bolton Monday night that his services were no longer needed at the White House. (AP Photo/Susan Walsh)

Iran's Ambassador to the International Atomic Energy Agency, IAEA, Gharib Abadi, waits for the start of the IAEA board of governors meeting at the International Center in Vienna, Austria, Monday, Sept. 9, 2019. (AP Photo/Ronald Zak)

In this photo released by the Atomic Energy Organization of Iran, spokesman of the organization Behrouz Kamalvandi speaks in a news briefing in Tehran, Iran, Saturday, Sept. 7, 2019. Iran has begun injecting uranium gas into advanced centrifuges in violation of its 2015 nuclear deal with world powers, Kamalvandi said. (Atomic Energy Organization of Iran via AP)

In this photo released by the Atomic Energy Organization of Iran, spokesman of the organization Behrouz Kamalvandi speaks in a news briefing as advanced centrifuges are displayed in front of him, in Tehran, Iran, Saturday, Sept. 7, 2019. Iran has begun injecting uranium gas into advanced centrifuges in violation of its 2015 nuclear deal with world powers, Kamalvandi said. (Atomic Energy Organization of Iran via AP)

Iranian President Hassan Rouhani speaks at a session of parliament to debate his proposed tourism and education ministers, in Tehran, Iran, Tuesday, Sept. 3, 2019. Rouhani said European nations are failing to implement their commitments following the U.S. pullout from the 2015 nuclear deal with Tehran. (AP Photo/Vahid Salemi)

Finnish Minister of Defence Antti Kaikkonen, left, with High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini and Finnish Commissioner of Jobs Jyrki Katainen, pose for a photo of the Informal Meeting of EU Defence Ministers in Helsinki, Finland, on Thursday, Aug. 29, 2019. The topics for discussions of the meeting include artificial intelligence and the effect of climate change on defence and security. (Jussi Nukari/

In this photo released by the official website of the office of the Iranian Presidency, President Hassan Rouhani speaks in a conference in Tehran, Iran, Monday, Aug. 26, 2019. Rouhani defended his foreign minister's surprise visit to the G-7 summit, saying he ready to go anywhere to negotiate a way out of the crisis following the U.S. pullout from the nuclear deal. (Iranian Presidency Office via AP)