Nonprofits like Brad Pitt's Make It Right Foundation are helping Robert Green and other survivors of Hurricane Katrina rebuild their homes -- and their lives -- in New Orleans' Lower 9th Ward.

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New Orleans: Then and now
Four years after Katrina, the city has made progress in returning to its former glory, but many area still need attention.
Snapshot: By the numbers
Jobs. Tourists. Housing. Crime. What do the numbers say about the area and its recovery four years later?
Impact Your World
Four years after Katrina, what is New Orleans like now? Some residents continue to face challenges as the Big Easy keeps trying to rebuild.
AC360 Blog
Special coverage from New Orleans on AC360
A special week-long series from New Orleans
Share, See Your Stories on CNN Rebuilding the Gulf Coast
It's been four years since Hurricane Katrina devastated the Gulf Coast. Were you affected? How has your life changed? Are you still recovering?