Which in your opinion was worse of a tragedy & why?

9/11, the Tsunami in Asia, or Hurricane Katrina? They're all pretty bad, but maybe the reason why I feel that Katrina is the worst because I experienced it, & I thought I was gonna die. I seriously didn't think I was gonna be alive now. & it took me a week to find my family, & I lost my home & had to move to a whole 'nother state.