UN Secretary-General Antonio Guterres is urging people everywhere to protect the millions of civilians trapped in conflicts around the world who are routinely being killed in direct and indiscriminate attacks. <br/><br/>He told a UN event on the eve of World Humanitarian Day that protecting civilians, humanitarian workers and healthcare staff is required under international law, yet in war zones all over the world, parties to conflict are flouting their obligations.<br/><br/>UN humanitarian chief Stephen O'Brien said that since the General Assembly designated World Humanitarian Day in 2008 many thousands of aid workers have been killed in direct or indirect attacks. Last year, he said, 288 aid workers were targeted in 158 attacks.