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The Acropolis of Athens is seen illuminated in blue, the color of the United Nations Children's Fund (UNICEF), in Athens, Greece, on Nov. 20, 2019. The Acropolis of Athens was illuminated on Wednesday in blue, the color of the United Nations Children's Fund (UNICEF), to mark the 30th anniversary of the United Nations Convention on the Rights of the Child signed on Nov. 20, 1989, Greek national news agency AMNA reported. (Photo by Lefteris Partsalis/Xinhua)