Survivors and victims' relatives will this week mark the 20th anniversary of the 2004 Indian Ocean earthquake and tsunami, which killed more than 220,000 people across more than a dozen countries. A 9 ...

It's been 20 years since the Indian Ocean tsunami, which spanned 14 countries and left more than 230,000 dead. National Geographic's new series, "Tsunami: Race Against Time," provides a 360-degree ...

Relatives of victims of the 2004 Indian Ocean tsunami hold a candlelight vigil as they recognize the 20th anniversary of the natural disaster, at Tsunami Memorial Park at Ban Nam Khem, Takuapa ...

Experts said they were “blind” to the Indian Ocean tsunami in 2004. Twenty years later, working toward a world without tsunami deaths is a challenge. By Katrina Miller The Indian Ocean tsunami in 2004 ...