A destroyed police helicopter from the 2004 Indian Ocean tsunami displayed next to the Ulee Lheue Mass Grave in Banda Aceh. Picture: AFP Emotional ceremonies are being held across Asia on Thursday ...

JOEL SAGET/AFP via Getty Images Elephants pull ... island after a massive undersea earthquake triggered a tsunami December 26, 2004. An aerial view of the Tsunami- stricken coastal region ...

An Acehnese man among the ruins in Banda Aceh, on January 13, 2005, weeks after the 2004 Indian Ocean tsunami [File: Kazuhiro Nogi/AFP] The pain is still fresh as Cut Sylvia recalls the last time ...

A man from the Sentinelese tribe aims his bow at an Indian Coast Guard helicopter as it flies over the Andaman Islands in the wake of the 2004 Indian Ocean tsunami (Picture: AFP Photo/Indian Cost ...

Andaman Sea (Thailand) (AFP) – Almost 1,000 kilometres off the Thai coast devastated by a tsunami 20 years ago, engineers lower a detection buoy into the waves -- a key link in a warning system ...