FILE - Arnold James tries to keep his feet as a strong gust nearly blows him over as makes his way on foot to the Louisiana Superdome in New Orleans, Aug. 29, 2005. (AP Photo/Dave Martin, File) FILE - ...

NEW ORLEANS — Twenty years after Hurricane Katrina devastated the U.S. Gulf Coast with catastrophic storm surge and flooding, New Orleans marked the storm's anniversary Friday with solemn memorials, ...