United Nations Secretary-General Antonio Guterres attends the unveiling of the installation "Pandemic Classroom," a model classroom made up of 168 empty desks, at the UN headquarters in New York on March 2, 2021, to call attention to the need for governments to prioritize the reopening of schools. Schools for more than 168 million children worldwide have been completely closed for almost a full year because of the coronavirus pandemic, the United Nations Children's Fund (UNICEF) said on Tuesday. (Eskinder Debebe/UN Photo/Handout via Xinhua)