Stairs, which are all that remain where a house once stood, are pictured in Waveland, Mississippi, August 26, 2015. 
Jonathan Bachman / Reuters

British Prime Minister Sir Winston Churchill is credited for having once said, “Never let a good crisis go to waste.” This saying can carry both positive and negative connotations: If Churchill said it (it cannot be found in his recorded speeches, personal notes, or his books), he was probably using it in a wartime context, such as the Battle of Dunkirk. But when then–Illinois Congressman Rahm Emanuel said it in 2008, he added an explanatory extension, “What I mean by that it’s an opportunity to do things you could not do before.” Neither Churchill nor Emanuel were talking about

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