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 In this June 26, 2019, file photo United Airlines jetliners pass each other at Denver International Airport. (AP Photo / David Zalubowski, File)

The change in the rule — it’s called “bottle-to-throttle” in the airline business — comes several days after two United pilots were arrested in Scotland and charged with suspicion of being under the influence before a flight to the U.S.

In this Tuesday, Aug. 13, 2019, file photo trader Andrew Silverman works on the floor of the New York Stock Exchange. (AP Photo / Richard Drew, File)

Weak economic data around the world also unnerved investors, who flipped back into selling mode after driving a rally Tuesday on hopeful signals that the U.S.-China trade war may not be worsening so much.

This 1978 electron microscope image made available by the Centers for Disease Control and Prevention shows Legionella pneumophila bacteria, which are responsible for causing the pneumonic disease Legionnaires’ disease. (Francis Chandler / CDC via AP)

In a report released Wednesday, top U.S. science experts said annual cases of Legionnaires’ disease jumped more than fivefold from 2000 to 2017, and that as many as 70,000 Americans get the disease every year.

Chicago Police Officer John Rivera (Chicago Police Department)

After a night out with friends in River North, off-duty Chicago police Officer John Rivera apparently realized a dangerous situation was unfolding. Moments later, the 23-year-old was fatally shot inside his vehicle.

(Photo by Chicago DCASE)

Stunt planes, Italian fare, vintage finds and hummingbirds usher in the weekend. Here are 10 things to do in and around Chicago.

The Blanding’s turtle is classified as endangered in Illinois. (Courtesy Chicago Wilderness)

The Trump administration’s move to effectively weaken protections under the landmark law could have stark consequences for the 480 plant and animal species classified as endangered or threatened within Illinois. 

Watch the Aug. 14, 2019 full episode of “Chicago Tonight.”

Prosecutor Joe McMahon at the sentencing hearing of former Chicago police Officer Jason Van Dyke at the Leighton Criminal Court Building on Friday, Jan. 18, 2019 in Chicago. (Antonio Perez / Chicago Tribune / Pool)

Until this week, 18 documents from the landmark case had remained under seal, even though the former officer was convicted 10 months ago for the murder of Laquan McDonald.

Keya Trammell

Sometimes, the very thing that brings a person the most trouble in life can become a source of joy and inspiration. Meet local singer – and mentor – Keya Trammell.

Cook County Circuit Court Clerk Dorothy Brown speaks with WTTW News on Wednesday, Aug. 14, 2019. (WTTW News)

Long the subject of federal scrutiny, Cook County Circuit Court Clerk Dorothy Brown explains why she will not seek re-election.

Amid workplace raids, what responsibilities do employers have to verify immigration status? And what rights do workers have?

Democrats take the stage for Governor’s Day at the state fair in Springfield. Our politics team tackles the 2020 election and more in our weekly roundtable.

U.S. Bureau of Engraving and Printing Director Len Olijar speaks with WTTW News.

Coins and cash are the focus the annual World’s Fair of Money. It’s in the Chicago area this year and we visited to get a load of all the loot.