The caption below the photo: Photo (November 4, 2010) doesn't identify the aircraft; which appears to be an MD-80 series, pictured. It simply states when the photo was taken. The excerpt from the article, in italics, describes a different aircraft. The article itself, which you obviously didn't read, describes a number of different aircraft; both narrow and wide body, flying over Willis Tower.
Proudly Posting without reading the Article since 1998!