Final answer:
The Trump International Hotel and Tower is the third tallest building in the Western Hemisphere.
Step-by-step explanation:
The third tallest building in the Western Hemisphere is the Trump International Hotel and Tower. It is located in Chicago and stands at a height of 1,388 feet (423 meters). The Willis Tower (formerly known as the Sears Tower) is the tallest building in the Western Hemisphere, followed by the Aon Center, which is the second tallest.