BROOKLYN, NY, UNITED STATES – 2021/01/10: Participants holding illuminated letters that read #NUCLEARBAN. Activists from New York-based direct action group Rise and Resist and the International Campaign to Abolish Nuclear Weapons (ICAN) took to the streets to announce the entry into force of the Treaty on the Prohibition of Nuclear Weapons on January 22, 2021 by holding illuminated letters that read #NUCLEARBAN in front of iconic New York landscapes. (Photo by Erik McGregor/LightRocket via Getty Images)