Tsunami Facts & Stories

We are watching "The Impossible" based on one family's true account of the deadliest tsunami in human history.  After reading the facts about tsunamis found here and the first hand account of a survivor found here.  What could have saved the lives of thousands of people that was missing in 2004?  Are tsunami's still a threat? What region of the world is most at risk for tsunamis? Are we at risk?  Petra Nemcova is an incredible individual - not only surviving but turning tragedy into opportunity for hope.  What has she done to help the survivors of the tsunami?