Disarmament

In this photo released by an official website of the office of the Iranian supreme leader, Supreme Leader Ayatollah Ali Khamenei delivers his sermon in the Friday prayers at Imam Khomeini Grand Mosque in Tehran, Iran, Friday, Jan. 17, 2020. Iran's supreme leader said President Donald Trump is a "clown" who only pretends to support the Iranian people but will "push a poisonous dagger" into their backs, as he struck a defiant tone in his first Friday sermon in Tehran in eight years. (Office of the Iranian Supreme Leader via AP)

Acting Russian Foreign Minister Sergey Lavrov speaks during his annual roundup news conference summing up his ministry's work in 2019, in Moscow, Russia, Friday, Jan. 17, 2020. (AP Photo/Alexander Zemlianichenko)

In this photograph taken Saturday, Jan. 11, 2020, protesters hold flowers as tear gas fired by police rises at a demonstration in front of Amir Kabir University in Tehran, Iran, to remember victims of a Ukrainian airplane shot down by an Iranian missile. On Monday, Jan. 13, 2020, online videos purported to show that Iranian security forces fired both live ammunition and tear gas to disperse demonstrators protesting against the Islamic Republic's initial denial that it shot down a Ukrainian jetliner. (AP Photo)

FILE - In this Dec. 23, 2019 file photo released by the Atomic Energy Organization of Iran, technicians work at the Arak heavy water reactor's secondary circuit, as officials and media visit the site, near Arak, Iran. Britain, France and Germany said Tuesday Jan. 14, 2020, they are triggering a dispute mechanism that is part of the nuclear deal with Iran over its failure to live up to terms of the pact. (Atomic Energy Organization of Iran via AP, File)

South Korean President Moon Jae-in speaks during his New Year press conference at the presidential Blue House in Seoul, South Korea, Tuesday, Jan. 14, 2020. (Kim Hong-Ji/Pool Photo via AP)

In this image from video, Secretary of Defense Mark Esper talks to the press on Iran and Iraq, Tuesday, Jan. 7, 2020, at the Pentagon in Washington. (divids via AP)

In this Wednesday, Jan. 8, 2020 photo, Michael Ingram touches the framed uniform of his son, Sgt. Michael Ingram Jr., as he talks about the 2010 death of his son in Kandahar, Afghanistan, during an interview in Carlton, Mich. With the announcement that America was not going immediately into war on Wednesday, Ingram said, “I was proud of Trump because I thought it was going to get a lot worse. I thought it was going to be bombing all night long, and I don’t want anyone to die.” He voted for the president three years ago and suspects he will again. (AP Photo/Claire Galofaro)

Russian President Vladimir Putin, right, and German Chancellor Angela Merkel Greer each other prior to the talks in the Kremlin in Moscow, Russia, Saturday, Jan. 11, 2020. Merkel visits Moscow to discuss current international issues such as the situation in Syria, Libya, Ukraine, US-Iran tensions, as well as bilateral relations. (AP Photo/Pavel Golovkin, Pool)

In this Wednesday, Jan. 8, 2020 photo, rescue workers search the scene where a Ukrainian plane crashed in Shahedshahr, southwest of the capital Tehran, Iran. Iran on Friday denied Western allegations that one of its own missiles downed a Ukrainian jetliner that crashed outside Tehran, and called on the U.S. and Canada to share any information they have on the crash, which killed all 176 people on board. (AP Photo/Ebrahim Noroozi)