Chicago’s Willis Tower (formerly Sears Tower) is the tallest building in North America. Its massive profile dominates the skyline and the cityscape. Spread over its 1,450-foot height are 3.8 million square feet of space.
However, there is another building in Chicago that encompasses approximately the same number of square feet. So this month your Puzzler is:
What is the other building besides the Willis Tower to have in the neighborhood of 3.8 million square feet?
OK there you go! Just submit your answer as a comment. I’ll reveal the solution in a couple of weeks.