UPDATED: 10/1/2013 9:40 a.m.

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CHICAGO (CBS) — Air traffic controllers and airport security agents will be on the job, but many other federal government services are not available on Tuesday.

The federal government partially shut down at midnight after Congress missed a deadline to pass a funding bill to pay many workers.

It’s the first shutdown of the federal government since 1995, CBS 2 Mike Puccinelli reports.

In all, 800,000 workers, who are deemed non-essential, were sent home this morning after they shut down their operations.

Thomas Mitchell arrived in the Loop on Tuesday morning for his job with the Internal Revenue Service.

He thought he would work half a day. However, he was sent home without working and without pay.

“I live paycheck to paycheck, unfortunately,” he said.

And he’s not alone.

Krishnan Aghi is a project manager with the General Services Administration. He and other GSA employees came in to wind down operations in their offices at the Kluczynski Federal Building.

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He said his budget gives him about two weeks without a paycheck.

“It’s very frustrating,” he said, adding that he’s annoyed that members of Congress will continue to get paid.

Illinois workers paid by federal funds, including workers in the Illinois Emergency Management Agency, Veterans Affairs and Military Affairs are among those affected.

At the Great Lakes Naval Station, as many as 2,500 civil service workers face furloughs.

All national parks will be closed today, including the Indiana Dunes National Lakeshore.

Fifty permanent employees and up to 12 seasonal workers are off the job there, although they plan to come in for a few hours to shut things down and make sure campers leave.

At the Dunewood campgrounds there, visitors will have 48 hours to leave.

On a beautiful summer-like day, the shutdown could not come at a worse time.

The popular Lincoln Home National Historic Site in Springfield will also be closed, according to said Patty Rooney, a spokeswoman for the National Park Services’ Midwest region.

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There will be mail delivery during the shutdown, as the Postal Service is not a government agency.