Then and Now: New Orleans after Hurricane Katrina

PEOPLE.com revisits the city – and its determined residents – four years after the devastating storm

'A WHOLE NEW LIFE'

Just months after Hurricane Katrina blew the roof off Margaret Smith's Uptown house in August 2005, volunteers rushed to New Orleans to help rebuild. "I was a needle in a haystack in New Orleans," she tells PEOPLE, "and across America people came here and changed my life." Smith, 54, now operates a specialty collectibles shop in the front room of her refurbished home (pictured). "Everything is new again," she says. "Thank you America for giving me a whole new life."