I realize the NATO summit may be a hassle for several days (and the weeks of media hype) but it reinforces a point that Chicagoans often worry about: Chicago is indeed a world-class city, #7 on a recent list. This ranking, meaning that Chicago is a top ten city in the world (!), has both advantages and disadvantages. Even though this ranking may include short periods of difficulty, millions of metropolitan-area residents have benefited in the past and will benefit in the future.