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A picture made available on 21 October 2016 shows a Yemeni artist spraying a graffiti on a wall in protest against the ongoing conflict and the worsening economic situation in the war-affected country, in Sana’a, Yemen, 20 October 2016. According to reports, since March 2015, ongoing conflict and the Saudi-led airstrike campaign in Yemen have left 21.2 million – 82 percent of Yemen’s population – in dire need of humanitarian aid, including 9.9 million children. EPA/YAHYA ARHAB