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

At the Athens 2004 Olympics, Hicham El Guerrouj claimed victory in the men’s 1,500m. He also triumphed in the men’s 5,000m at the same Games, becoming the second athlete in history to achieve this feat, after Paavo Nurmi. 🥇🇲🇦 #WorldAthletics | Olympics