The Willis Tower is said to be the tallest building in the western hemisphere. So, when ice drops from the top, it can fall several blocks away from the building.
Police closed several streets around the tower on Tuesday to keep pedestrians safe.
The Willis Tower is said to be the tallest building in the western hemisphere. So, when ice drops from the top, it can fall several blocks away from the building.
Police closed several streets around the tower on Tuesday to keep pedestrians safe.