Levees designed to protect New Orleans from imaginary hurricanes, not real ones

After Hurricane Betsy ravaged New Orleans in 1965, the city fortified itself with levees that could supposedly offer protection for a storm of up to a Category 3 strength, and then only a fast-moving Category 3. As more and more of Louisiana's coastline disappeared over the years, it became obvious to anyone who lived in New Orleans that what may have worked in 1965 was quite likely to be useless.

(Continue reading at MoJo Blog)