TOPSHOT - People pray to mark the 15th anniversary when an earthquake and resulting tsunami killed at least 170,000 people in the country and thousands of others in neighbouring countries, at a cemetery containing mass graves in Ulee Lheue, Banda Aceh on December 26, 2019. - On December 26, 2004, a monstrous 9.3 magnitude quake struck undersea off the coast of Sumatra, sparking a tsunami nearly 100 feet (30 meters) high that killed more than 220,000 across a string of Indian Ocean countries, including Thailand, Sri Lanka and India. (Photo by CHAIDEER MAHYUDDIN / AFP)