UNICEF youngest ambassador pledges to speak out for children's rights

British actress Millie Bobby Brown (L) receives a UNICEF T-shirt at a press conference at the UN headquarters in New York, on Nov. 20, 2018. Millie Bobby Brown on Tuesday pledged to "speak out" for children's rights in her new role as the youngest goodwill ambassador of the UN children's agency. (Xinhua/Li Muzi)