Gone are the most visible reminders of Hurricane Katrina, the vacant houses and businesses, with dirty water lines still showing the depth of the floodwaters.

But 20 years later, scars linger across pockets of St. Tammany Parish . They reveal themselves from time to time.

"I didn't sleep well last night -- the thunder and lightning brought back some bad memories," Kevin Davis of Slidell said after a ceremony at the city's Camp Salmen Nature Park to dedicate a Katrina memorial.

But, Davis said, taking a step back, talking about what happened and marking momentous happenings -- good and bad -- has its value.

"I think we'll always memorialize Katrina," Davis, who was St. Tammany Parish president in 2005 when Katrina roared ashore, with its eye crossing roughly over the Louisiana-Mississ

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