NEW ORLEANS -- Bells tolled in this shattered city Tuesday morning, marking the moment one year earlier when New Orleans' levees buckled, unleashing a torrent of water that ripped homes from their foundations and sent half the city into an uncertain exile.
As the bells rang, survivors of the storm gathered outside City Hall.
"I felt like I needed to be here. It's like a funeral, and life goes on after today," said Gayla Dunn, 33, of New Orleans.
Mayor Ray Nagin told the crowd the anniversary was a difficult day for everyone, including himself.
"Trust me. We will get through it. We will get through it together," he said.
As Nagin was speaking at City Hall, President Bush and first lady Laura Bush were singing a hymn inside St. Louis Cathedral in the untouched French Quarter, which survived Katrina's cyclonic winds.
Hurricane Katrina made landfall 65 miles south of the city in the tiny fishing village of Buras. Within hours, New Orleans' protective levees collapses, causing one of the worst natural disasters in U.S. history which killed over 1,800 people.
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One year later, the Gulf Coast commemorated the storm that brought the region to its breaking point with rituals of mourning and celebrations of life.
The day began with eyes closed and heads bowed, and the knowledge that another large storm was swirling toward Florida.