TOPSHOT - Students cover their heads during an earthquake and tsunami drill at their school in Banda Aceh on October 9, 2018. - A huge 9.1 magnitude undersea quake in 2004 triggered a tsunami that killed more than 170,000 people in Aceh province, on western Sumatra island, and tens of thousands more in other countries with coasts on the Indian Ocean. (Photo by CHAIDEER MAHYUDDIN / AFP)