For more than four decades, Viracon in Owatonna, Minn. has been a leading glass manufacturer, and for the past four years, it's been working on one of its most important projects.
"This is part of history. Everybody is going to know about it, and you can say the glass on that building is Viracon glass," Doug Zirngible, Viracon, said.
Thousands of panels are still being shipped to ground zero. They're being used on the new World Trade Center Towers, as well as a memorial and museum.
"Very proud. Our people are really proud of what we do over here," Viracon employee Robert Dulitz said.
Robert Dulitz has been an employee at Viracon for 25 years. He says this project is unlike any other.
"We honored to do this kind of job. It's high prestige for us to do. It just feels great," he said.
Just up the road from Owatonna, another Minnesota company is also working on the World Trade Center project. McQuay International in Faribault, Minn. is producing heating and cooling systems.
The units are massive, and unlike anything McQuay has produced before.
"It's a brand new design."
The company says, for security reasons, it can't give out specifics, but it did beat out other companies world-wide to get the contract. And just like workers at Viracon, employees at McQuay say they honored to do this job.
Throughout the week ABC 6 News will continue looking back at how 9/11 changed our lives.
Thursday, ABC 6 News Anchor Betsy Singer takes a look at how attitudes toward muslims have changed since the terror attacks.