Hurricane Katrina revisited

New Orleans' Lower 9th Ward suffered the worst of Hurricane Katrina's winds and floods on August 29, 2005. A wall of water from the city's Industrial Canal rushed into the streets, killing dozens of people. (Andrea Booher/FEMA

Tim SAR mengunjungi kereta penumpang Metro-North yang tergelincir di Bronx, New York, 1 Des., 2013. Dinas Pemadam Kebakaran New York menyatakan ada 130 petugas di tempat kejadian.

Stray dog in New Orleans' Lower 9th Ward following Hurricane Katrina. (Andrea Booher/FEMA photo, Oct. 22, 2005)

In this Dec. 15, 2010 aerial photo, the Inner Harbor Navigation Canal (IHNC) Surge Barrier, constructed after Hurricane Katrina to prevent tidal surges from hurricanes from reaching New Orleans, is shown in St. Bernard Parish, La. AP Photo/Gerald Herber

The Army Corps of Engineers was given about $14 billion to improve flood defenses after Katrina. The corps says the city is ready to handle a storm that experts say would resemble a Category 3 hurricane. (AP Photo/Gerald Herbert)

The Army Corps of Engineers has built a new flood prevention system to protect New Orleans. (US Army Corps of Engineers photo)

Lower 9th Ward lifelong resident Lawrence Lucas rebuilt his son's home adjacent to a relative's recently-reconstructed house. He says many elderly people who fled Katrina have not returned. Michael Lipin/VOA, Sept. 23, 2011)

View of the Lower 9th Ward side of the reconstructed Industrial Canal floodwall, looking north. (Michael Lipin/VOA, Sept. 23, 2011)

On Hurricane Katrina's seventh aniversary, Huricane Isaac floods parts of Waveland, Miss., Aug. 29, 2012.