Location: 233 S Wacker Dr, Chicago, IL
The 110 story Willis Tower is the tallest building in Chicago and has kept its title since completion in 1974. The Willis Tower is home to the WLS (World’s Largest Store) radio station on the 101st floor. USA Fire Protection worked to remodeling the new transmitting station for WLS radio. Just like the building, WLS has kept up the same popularity since its establishment in 1924.