In 2004, a large earthquake in the Indian Ocean triggered the largest tsunami in recorded history. One of the countries hit by the tsunami was Sri Lanka, where the wave caused one of the worst train disasters in human history when it hit the Queen of the Sea passenger line, which was carrying 1,500 passengers along Sri Lanka's west coast. Watch Destruction Decoded on Wednesdays at 8pm on National Geographic UK. | National Geographic UK

🌊 On 26 December 2004 – 20 years ago today – the Indian Ocean tsunami was a wake-up call for humanity. 🌏Its devastating impacts rippled across countries and geographies. But in the aftermath of the international community came together to offer affected communities support and to take action to protect the world against future risks. Within 18 months this unprecedented global collaboration established a new Indian Ocean early warning system – an achievement that should inspire us to tackle the