On November 12, commercial brokers everywhere were stunned by the news that New York’s One World Trade Center had supplanted Chicago’s Willis Tower as the tallest building in the Western Hemisphere.

Stunned? Okay, maybe not.

After all, it’s not as if the announcement from the Council on Tall Buildings and Urban Habitat makes Willis Tower any shorter. If your client likes the view from 1200 feet, he’s still got it.

But the news got us asking questions about how commercial brokers deal with skyscraper space. Here’s what we found out.