(WBBM NEWSRADIO) — The annual Respiratory Health Association's Hustle Chicago on Sunday, had people climbing sky high for a cause. More than 2,000 people signed up to climb 94 flights.

In fact, the 12th tallest building in the world, the John Hancock Center in Chicago, has five sets of enormous diagonals on each of its four sides to keep from falling over in the wind.

Take for instance the U.S. Steel South Works Plant, which produced the material to build the Sears Tower and John Hancock ...