WLS calls used to stand for World's Largest Store. Today, sadly, they have a completly different meaning.
http://www.foxnews.com/story/0,2933,532960,00.html?mrp
CHICAGO — The Sears Tower, one of the world's iconic skyscrapers and the tallest building in the U.S., was renamed the Willis Tower on Thursday in a downtown ceremony, marking a new chapter in the history of the giant edifice that has dominated the Chicago skyline for nearly four decades.
http://www.foxnews.com/story/0,2933,532960,00.html?mrp
CHICAGO — The Sears Tower, one of the world's iconic skyscrapers and the tallest building in the U.S., was renamed the Willis Tower on Thursday in a downtown ceremony, marking a new chapter in the history of the giant edifice that has dominated the Chicago skyline for nearly four decades.