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1 (of 4) ICAN, represented by Setsuko Thurlow and Beatrice Fihn, receive the Nobel Peace Prize Medal and Diploma from Berit Reiss-Andersen of the Norwegian Nobel Committee, during the award ceremony in Oslo on 10 December 2017.

Copyright © The Nobel Foundation 2017 Photo: Ken Opprann

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2 (of 4) Setsuko Thurlow and Beatrice Fihn viewing the traditional torch light procession in Oslo from a balcony at the Grand Hotel in Oslo, Norway on 10 December 2017.

Copyright © The Nobel Foundation 2017 Photo: Ken Opprann

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3 (of 4) Signing ceremony for the UN Treaty on the Prohibition of Nuclear Weapons at the United Nations Headquarters, New York, 20 September 2017.

Photo: Darren Ornitz/ICAN

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4 (of 4) Moment of treaty adoption on 7 July 2017, when an overwhelming majority of the world's nations adopted a landmark global agreement to ban nuclear weapons.

Photo: Clare Conboy