David I was in Chicago for my granddaughters second birthday. My daughter works for British Petroleum as a Atmospheric Chemist her specialty is Hydrogen . I photographed a lot of buildings and went on top of the Willis Tower ( Sears Tower) to the observation deck. I looked the same window they used for Farris Buler's day off there is a plack on the wall by the window denotes the movie. So many tall buildings and draw bridges to photograph along the Chicago River ( Now so many pictures to edit )
