Tourists walk behind a faded sign warning of tsunami hazard in Khao Lak, Phang Nga province December 15, 2014. Ahead of the anniversary of the 2004 tsunami, experts and officials say key weaknesses remain across the region in the system designed to warn people of the next disaster, and get them to safety. Thailand prepares to mark the tenth anniversary of the 2004 tsunami, the deadliest on the record, that killed at least 226,000 people in 13 Asian and African countries. In Thailand, over 5300 people were killed, including several thousand foreign tourists, when the waves swamped six coastal provinces, turning some of the world's most beautiful beaches into mass graves. REUTERS/Damir Sagolj (THAILAND - Tags: DISASTER ENVIRONMENT SOCIETY ANNIVERSARY)


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