Ambassador of Russia to the U.N. office Gennady Gatilov sits behind Russian Foreign Minister Sergei Lavrov during his speech at the Conference on Disarmament at the United Nations in Geneva, Switzerland, February 25, 2020. PREUTERS/Denis Balibouse

Ambassador of Russia to the U.N. office Gennady Gatilov arrives with Russian Foreign Minister Sergei Lavrov at the Conference on Disarmament at the United Nations in Geneva, Switzerland, February 25, 2020. PREUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov leaves after a speech at the Conference on Disarmament at the United Nations in Geneva, Switzerland, February 25, 2020. Picture taken with a fisheye lens. REUTERS/Denis Balibouse

Saudi Foreign Minister Faisal Bin Farhan al-Saud attends the Conference on Disarmament at the United Nations in Geneva, Switzerland, February 24, 2020. REUTERS/Denis Balibouse

Saudi Foreign Minister Faisal Bin Farhan al-Saud attends the Conference on Disarmament at the United Nations in Geneva, Switzerland, February 24, 2020. REUTERS/Denis Balibouse

A gun delivered by a citizen as part of a voluntary disarmament program is pictured in Mexico City, Mexico April 3, 2019.REUTERS/Edgard Garrido

Weapons destroyed by soldiers after being delivered by citizens as part of a voluntary disarmament program, are pictured in Mexico City, Mexico April 3, 2019. REUTERS/Edgard Garrido

A soldier destroys weapons delivered by citizens as part of a voluntary disarmament program in Mexico City, Mexico April 3, 2019.REUTERS/Edgard Garrido

A soldier shows a gun delivered by a citizen as part of a voluntary disarmament program in Mexico City, Mexico April 3, 2019.REUTERS/Edgard Garrido

A citizen swaps weapons for money as part of a voluntary disarmament program in Mexico City, Mexico April 3, 2019.REUTERS/Edgard Garrido

Russian Foreign Minister Sergei Lavrov arrives with Ambassador Robert Wood, U.S. Permanent Representative to the Conference on Disarmament during a session of the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov sits next to Ambassador Robert Wood, U.S. Permanent Representative to the Conference on Disarmament during a session of the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov shakes hands with Ambassador Robert Wood, U.S. Permanent Representative to the Conference on Disarmament after his speech at the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

U.S. Ambassador and President of the Conference on Disarmament Robert Wood attends a session at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov addresses the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov addresses the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov addresses the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Russian Foreign Minister Sergei Lavrov addresses the Conference on Disarmament at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

U.S. Ambassador and President of the Conference on Disarmament Robert Wood attends a session at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

U.S. Ambassador and President of the Conference on Disarmament Robert Wood attends a session at the United Nations in Geneva, Switzerland, March 20, 2019. REUTERS/Denis Balibouse

Director for Strategic Affairs, Security and Disarmament of the French Foreign Ministry Nicolas Roche attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China January 31, 2019. REUTERS/Thomas Peter/Pool

U.S. Under Secretary of State Andrea Thompson (L) and Director General of the Department of Arms Control and Disarmament of the Chinese Foreign Ministry Fu Cong attend a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China January 31, 2019. REUTERS/Thomas Peter/Pool

Director for Strategic Affairs, Security and Disarmament of the French Foreign Ministry Nicolas Roche attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China January 31, 2019. REUTERS/Thomas Peter/Pool

Russian Deputy Foreign Minister and head of delegation Sergey Ryabkov (L) greets U.S. delegation head Under-Secretary of State Andrea Thompson (C) and U.S. Permanent Representative to the Conference on Disarmament Robert Wood at a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference with the UN Security Council's five permanent members (P5) China, France, Russia, Britain, and U.S., in Beijing, China, January 30, 2019. REUTERS/Thomas Peter/Pool

FILE PHOTO: North Korea's ambassador to the United Nations Han Tae Song attends the Conference of Disarmament at the United Nations in Geneva, Switzerland, February 27, 2018. REUTERS/Denis Balibouse/File Photo

Syria's ambassador to the U.N. Hussam Aala attends as President of the Conference on Disarmament at the United Nations in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY

Syria's ambassador to the U.N. Hussam Aala (L) listens to Marco Kalbusch, Secretary of the CD before taking the presidency of the Conference on Disarmament (CD) at the United Nations in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

Syria's ambassador to the U.N. Hussam Aala (L) listens to Marco Kalbusch, Secretary of the CD before taking the presidency of the Conference on Disarmament (CD) at the United Nations in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

Syria's ambassador to the U.N. Hussam Aala attends as President of the Conference on Disarmament at the United Nations in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

Syria's ambassador to the U.N. Hussam Aala (R) arrives next to Michael Moeller UNOG Director-General to hold the presidency of the Conference on Disarmament at the United Nations in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

U.S. Ambassador Robert Wood (L) and members of the delegations stand in the corridor after walking out in protest at Syria's presidency of the Conference on Disarmament at the United Nations in Geneva in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

U.S. Ambassador Robert Wood and members of the delegations walk out in protest at Syria's presidency of the Conference on Disarmament at the United Nations in Geneva in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

U.S. Ambassador Robert Wood walks out in protest at Syria's presidency of the Conference on Disarmament at the United Nations in Geneva in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

U.S. Ambassador Robert Wood walks out in protest at Syria's presidency of the Conference on Disarmament at the United Nations in Geneva in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

U.S. Ambassador Robert Wood walks out in protest at Syria's presidency of the Conference on Disarmament at the United Nations in Geneva in Geneva, Switzerland May 29, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres gives a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres gives a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres gives a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres gives a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres give a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres give a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres give a statement after delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres delivers a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

United Nations Secretary-General Antonio Guterres is seen before delivering a speech on disarmament and denuclearisation at the University of Geneva (UNIGE) in Geneva, Switzerland, May 24, 2018. REUTERS/Denis Balibouse

U.S. Assistant Secretary for International Security Christopher A. Ford (R) listens to U.S. Ambassador to the Conference on Disarmament Robert Wood during the 2nd Preparatory session of the 2020 Non Proliferation Treaty (NPT) Review Conference at the United Nations in Geneva, Switzerland April 23, 2018. REUTERS/Denis Balibouse

U.N. High representative for Disarmament Affairs Izumi Nakamitsu (L) attends the 2nd Preparatory session of the 2020 Non Proliferation Treaty (NPT) Review Conference at the United Nations in Geneva, Switzerland April 23, 2018. REUTERS/Denis Balibouse

U.N. High representative for Disarmament Affairs Izumi Nakamitsu attends the 2nd Preparatory session of the 2020 Non Proliferation Treaty (NPT) Review Conference at the United Nations in Geneva, Switzerland April 23, 2018. REUTERS/Denis Balibouse

U.N. High representative for Disarmament Affairs Izumi Nakamitsu attends the 2nd Preparatory session of the 2020 Non Proliferation Treaty (NPT) Review Conference at the United Nations in Geneva, Switzerland April 23, 2018. REUTERS/Denis Balibouse

U.N. High representative for Disarmament Affairs Izumi Nakamitsu attends the 2nd Preparatory session of the 2020 Non Proliferation Treaty (NPT) Review Conference at the United Nations in Geneva, Switzerland April 23, 2018. REUTERS/Denis Balibouse

U.S. Ambassador to the Conference on Disarmament Robert Wood attends a news conference at the United Nations in Geneva, Switzerland, April 19, 2018. REUTERS/Denis Balibouse

U.S. Ambassador to the Conference on Disarmament Robert Wood attends a news conference at the United Nations in Geneva, Switzerland, April 19, 2018. REUTERS/Denis Balibouse

U.S. Ambassador to the Conference on Disarmament Robert Wood attends a news conference at the United Nations in Geneva, Switzerland, April 19, 2018. REUTERS/Denis Balibouse