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

Go inside the White House Situation Room during the Osama Bin Laden raid with then-CIA Director, Leon Panetta as he recounts the moment Navy Seals killed the Al Qaeda leader. Watch Case Studies in Presidential Leadership this Saturday at 9 AM ET on C-SPAN 2 American History TV and our website https://www.c-span.org/ahtv/ | American History TV