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NEW ORLEANS, LA - AUGUST 24: A small plant grows behind a window of a destroyed home in the Lower Ninth Ward on August 24, 2015 in New Orleans, Louisiana. The area was one of the most heavily devastated areas of the city following a levee breach during the aftermath of Hurricane Katrina. Much of the area has yet to be rebuilt. The tenth anniversary of Hurricane Katrina, which killed at least 1836 and is considered the costliest natural disaster in U.S. history, is August 29. (Photo by Mario Tama/Getty Images)

NEW ORLEANS, LA - AUGUST 24:  A small plant grows behind a window of a destroyed home in the Lower Ninth Ward on August 24, 2015 in New Orleans, Louisiana. The area was one of the most heavily devastated areas of the city following a levee breach during the aftermath of Hurricane Katrina. Much of the area has yet to be rebuilt. The tenth anniversary of Hurricane Katrina, which killed at least 1836 and is considered the costliest natural disaster in U.S. history, is August 29.  (Photo by Mario Tama/Getty Images)