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, ...

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, ...

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, ...

Jerome Williams Nola hugs his wife Ashley Williams along the floodwall of the Lower Ninth Ward of New Orleans, during an event to commemorate the 20th anniversary of Hurricane Katrina on Friday. (AP ...