Update: People have asked how I got the sky so dark. I did two things, the first was to increase the saturation of the original image using the Levels filter in photoshop. I also decreased the blue channel in the channel mixer when I converted the image to bw. This allowed me to achieve the same kind of effects I might have achieved if I had shot with bw film and used a blue filter.
10th St. and Market St., Saint Louis, MO