From rotary.org:

On August 29, 2005, Hurricane Katrina slammed into the U.S. Gulf Coast, devastating New Orleans and parts of Mississippi. Since then, Rotarians have been committed to the region's rebirth, raising millions of dollars for relief and recovery efforts. In May 2011, Rotary's most important annual event, the international convention, returns to New Orleans. 

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Former scholar writes book about Katrina