Military personnels salute during a wreath-laying ceremony held on International Day of UN Peacekeepers at the UN headquarters in New York, United States, May 29, 2015. UN Secretary-General Ban Ki-moon on Friday led the world body in honoring peacekeepers who died in UN peacekeeping operations worldwide, while saluting those who are serving their mandates in the world's most dangerous places. (Xinhua/Li Muzi)
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