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Soledad walks along 26-foot high wall that now separates the Gulf of Mexico from Lake Borgne. It's 2 miles long and was built after hurricane Katrina. They've closed gates and are hoping it will withstand the test of Hurricane Isaac.
Soledad walks along 26-foot high wall that now separates the Gulf of Mexico from Lake Borgne. It's 2 miles long and was built after hurricane Katrina. They've closed gates and are hoping it will withstand the test of Hurricane Isaac.

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    How 'the wall' will battle Isaac in NOLA

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How 'the wall' will battle Isaac in NOLA

Soledad O'Brien reports from 'the wall," a barrier at Lake Borgne that could save New Orleans from major flooding.

How 'the wall' will battle Isaac in NOLA

Soledad O'Brien reports from 'the wall," a barrier at Lake Borgne that could save New Orleans from major flooding.