People pray at a mass graveyard where thousands of the 2004 tsunami victims are buried during the commemoration of the 12th anniversary of the devastating tsunami at Ulee Lheue in Aceh, Indonesia, Dec. 26, 2016. This December marks the 12th anniversary of the Indian Ocean Tsunami, which was set off by a 9.1-magnitude earthquake on Dec. 26, 2004 and killed more than 230,000 people. (Xinhua/Junaidi)
