Hiroshima was devastated by atomic bombs during World War II on Aug. 6, 1945, while large parts of New Orleans were left flooded when the hurricane broke the city's levees last summer.
Lee returned to New Orleans to film the aftermath for his upcoming documentary When the Levees Broke: A Requiem in Four Acts and couldn't believe the devastation before him.
He says, "It looked like what I assume Hiroshima looked like after World War II.
"I just couldn't believe this was happening right now in America. It was one of those moments where you know someone will ask you years from now, 'Where were you when Katrina happened?'"
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