The chicago metropolitan area has an estimated population of 9.9 million people.
I've been to Chicago once. Grand Central Station on a stopoff on the way to San Antonio. That's a lot of people!
San Antonio is Spanish for Saint Anthony. It is the 7th most populated city in the US.
Yeah it's a nice little city. What is Chicago's main industry and exports?
The reion is home to more than 400 major corporate headquarters, including 31 in the Fortune 500. 
Wow. Like I said, I was only there once. That was way back in 1994. I took a train there. It seemed like a really lively place.
You should check out the region again. They gross over $561 billion in revenue every year.
Cool. Maybe I'll go to a Chicago Bulls game. I'm a big fan.