The Winner of the Tallest Building in America Is...

The World Trade Center and the Willis Tower in Chicago battle it out for the title.
1:41 | 11/12/13

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Transcript for The Winner of the Tallest Building in America Is...
seaworld, san diego. Next up here tonight the verdict is in and the winner is the big apple. Now officially home to the tallest building in america. The decision was not about a tape measure so is it fair? How did chicago come up a few feet short? Abc's bob woodruff has the news. Reporter: When we climbed to the top of the new one world trade, it felt like the top of the world. Oh, my gosh. Reporter: Today we know it will soon be officially the tallest building in america. Beating out chicago's willis tower in a fierce competition. When you line the two buildings up, the willis tower is actually 83 feet taller. When you add the freedom tower's spire it soars to a symbolic 1774 feet. The heated debate, does the spire count? The height committee's verdict today? Yes, it does. When one world trade is complete, it will become the third tallest building in the world. Number two, saudi arabia's clock tower. The tallest in dubai. Engineers say there is no reason we cannot build a building that's a milehigh. The biggest problem? Altitude sickness but they can pressurize the air for that. Mostly built out of pride, ego, human bris. Here in new york we have a message all our own. Do you have a message to america when you see this thing being rebuilt? I say be proud of what's going up. America should be proud that we did it every day for everyone. Reporter: Bob woodruff, abc news, new york.

This transcript has been automatically generated and may not be 100% accurate.

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