People are gathering in prayer and visiting mass graves in Indonesia’s Aceh province to mark 20 years since the massive ...

ABC News’ Diane Sawyer interviewed Nemcova in the months after the tragedy. Now, 20 years after one of the deadliest natural ...

Early warning systems have been installed in coastal areas to alert residents of potential tsunamis, providing crucial time to seek safety. The rebuilding efforts were made possible by the support ...