The Ark of Return, the Permanent Memorial to honor the victims of slavery and the transatlantic slave trade, is seen at the Visitors' Plaza of the UN headquarters in New York, March 26. 2018. Secretary-General of the United Nations Antonio Guterres on Monday urged General Assembly to remain "forever vigilant" in combating forced labor. He made the remarks at the General Assembly commemorative meeting for the International Day of Remembrance of the Victims of Slavery and the transatlantic Slave Trade. (Xinhua/Li Muzi)