On 26 December 2004, a magnitude 9.1 undersea earthquake struck 240km west of Sumatra, Indonesia, rupturing the greatest fault length of any recorded earthquake.

Traumatised by the Indian Ocean tsunami that hit Indonesia 20 years ago, Teuku Hafid Hududillah has spent his adult life making sure that if disaster strikes again, his home province of Aceh will be ready.

Tearful mourners prayed and lit candles on Thursday night at ceremonies across Asia to remember the 220,000 people killed two decades ago when a tsunami hit coastlines around the Indian Ocean in one of the world's worst disasters.

Countries across Asia held ceremonies to remember hundreds of thousands of people killed during the massive Indian Ocean tsunami two decades ago. People gathered in prayer and visited mass graves in Indonesia,