2004 tsunami victims remembered

A villager passes by a tsunami damaged house in Banda Aceh, Aceh, Indonesia, 26 December 2017.

Indian fisherman hoists a black flag on his fishing boat during a remembrance ceremony for the victims of the 2004 tsunami at Pattinapakkam Beach in Chennai on Dec. 26, 2017.

An Acehnese woman prays for her loved ones at a mass graves site in Banda Aceh on Dec. 26, 2017, who perished in the tsunami which devastated Aceh province 13 years ago, one of the worst natural disasters in human history. Some 170,000 lives were lost in the country when a 9.1-magnitude "megathrust" quake struck Aceh, a predominantly Muslim province in the northern tip of Sumatra island, bringing about massive waves that also hit coastal areas as far away as Somalia and killing 50,000 others in various countries.

Acehnese pose for a photo next to a ship-turned-into a memorial which was pushed some 1.55 miles inland by the 2004 tsunami in Banda Aceh on Dec. 26, 2017, as visitors remember one of the worst natural disasters in human history.

Women offer prayers during a ceremony for the victims of the 2004 tsunami at Pattinapakkam Beach in Chennai on Dec. 26, 2017.

Flowers are thrown into the sea as an offering during a ceremony for the victims of the 2004 tsunami at Pattinapakkam Beach in Chennai on Dec. 26, 2017.

Women carry flowers to be thrown into the sea as an offering during a ceremony for the victims of the 2004 tsunami.

Acehnesee people from the Tionghoa Ethnic community put flowers on the tsunami victim memorial in remembrance of their family members lost in the tsunami disaster at Lambaro tsunami mass grave in Lambaro, Aceh, Indonesia on Dec. 25, 2017.

Candles are lit on the tsunami victim memorial at the Lambaro tsunami mass grave in Lambaro, Aceh, Indonesia on Dec. 25, 2017.