Trauma lingers on for survivors of the deadly 2004 Indian Ocean tsunami / Thousands across Asia remember 2004 Indian Ocean tsunami victims / A look at the tsunami that devastated Indian Ocean coastal communities 20 years ago / How the 2004 Indian Ocean tsunami became a 'wake up call' for early warning systems / Prayers and tears mark 20 years since the Indian Ocean tsunami that killed some 230,000 people / Indian Ocean tsunami, 20 years on: Trauma still haunts survivors / Indian Ocean tsunami: how survivors found love after Boxing Day disaster / Will a tsunami strike India's west coast? / 'We didn't know the meaning of the word "tsunami" until Boxing Day 2004'