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In this Tuesday, June 28, 2016 file photo, a doctor prepares for a surgical procedure at a hospital in Washington. On Friday, Oct. 25, 2019, the U.S. Food and Drug Administration warned hospitals that they could soon face shortages of critical surgical tools and equipment due to a dwindling supply of the chemical used to sterilize many U.S. medical devices. (AP Photo/Molly Riley)

 Hospitals could soon face shortages of critical surgical tools because several plants that sterilize the equipment have been shut down, government health officials said Friday.

This file image made from video posted on a militant website April 29, 2019, purports to show the leader of the Islamic State group, Abu Bakr al-Baghdadi, being interviewed by his group’s Al-Furqan media outlet. (Al-Furqan media via AP, File)

Eliminating the Islamic State group’s elusive leader gives President Donald Trump a new argument for leaving Syria, but the U.S. military campaign against the extremists is far from finished.

In this Oct. 21, 2019 file photo, President Donald Trump speaks during a Cabinet meeting in the Cabinet Room of the White House. (AP Photo / Pablo Martinez Monsivais, File)

President Donald Trump’s visit to Chicago is stirring up a tempest in the city that he’s repeatedly derided as the poster child of urban violence and dysfunctional Democratic politics.

This undated photo provided by Mila Cohen shows Cohen, left, with her daughter Yelena Cohen. (Mila Cohen via AP)

For seven school days, Mila Cohen’s 14-year-old daughter retrieved her backpack and urged her mother toward the door — her usual morning routine before Chicago teachers went out on strike.

Striking teachers at Chicago Public Schools gather outside a CPS school on the city’s North Side on Monday, Oct. 28, 2019, day eight of the Chicago teachers strike. (WTTW News)

While city negotiators reached a tentative agreement Sunday with striking members of SEIU Local 73, a deal with the Chicago Teachers Union has remained elusive.

Taste of Lincoln Avenue (Special Events Management)

Gear up for nature walks, art shows and holiday markets of all sizes across Chicago and the suburbs. 

Watch the Oct. 28, 2019 full episode of “Chicago Tonight.”

Chicago Police Superintendent Eddie Johnson appears on “Chicago Tonight” on Aug. 9, 2018.

In skipping President Donald Trump’s speech Monday to police chiefs in Chicago, the city’s top cop earned a vote of no confidence from the local police union’s board, and a rebuke from the president himself.

Harms Woods (Courtesy North Branch Restoration Project)

The state has recognized a 169-acre section of Harms Woods, which is home to 400 different plant species, as an official state nature preserve, the highest level of protection for land in the state.

(Mike Mozart / Flickr)

The company didn’t say how many people were let go, but a Tribune report pegged the number at 100 employees at its Deerfield headquarters.

Ronnie Marmo as Lenny Bruce. (Photo by Doren Sorell)

Directed with just the right balance of the sacred and the profane by Joe Mantegna, Ronnie Marmo’s show, “I’m Not a Comedian ... I’m Lenny Bruce,” is a seamless weave of excerpts from Bruce’s acts along with original material that deftly takes us inside the man’s psyche.

There’s a new library in Chicago and it’s stocked with pretty much everything except books. We visit the newly opened Chicago Tool Library in Bridgeport.

President Donald Trump speaks at the International Association of Chiefs of Police Convention Monday, Oct. 28, 2019, in Chicago. (AP Photo / Charles Rex Arbogast)

President Donald Trump disparaged the city Monday as a haven for criminals that is “embarrassing to us as a nation.” The city’s top cop sat out Trump’s speech to protest the president’s immigration policies and frequently divisive rhetoric.

In this April 16, 2013 file photo, Illinois Rep. Luis Arroyo, D-Chicago, speaks on the House floor during session in Springfield, Illinois. (AP Photo / Seth Perlman)

Rep. Luis Arroyo, 65, bribed a legislative colleague with an offer of $2,500 a month in exchange for the state senator’s support of his sweepstakes-related legislation, according to a federal complaint unsealed on Monday.

A 4-pound piece of a meteorite that struck Costa Rica earlier this year was handed over to the Field Museum on Oct. 7, 2019. (John Weinstein / Field Museum)

A 4-pound chunk of a rare type of meteorite that crashed into a Costa Rican village this spring has found its way to Chicago, and experts say the rock likely contains clues to the origins of life on Earth.

Striking Chicago Public Schools teachers carry signs on Monday, Oct. 28, 2019, day eight of the Chicago teachers strike. (WTTW News)

The Chicago Teachers Union strike has surpassed its 2012 work stoppage in terms of missed school days. An update on negotiations from Chicago Public Schools and Chicago Teachers Union leaders.

Two Chicago Public Schools principals talk about the strike from their perspective – and what it will take to pick up the pieces when it eventually ends.

(Meagan Davis / Wikimedia Commons)

Illinois lawmakers returned to Springfield on Monday for the start of the fall veto session, but any new legislation could be overshadowed by a bribery charge filed against Democratic state Rep. Luis Arroyo. 

A new exhibit at the Chicago History Museum highlights the experiences of Muslims in Chicago through audio interviews, photographs, videos, artwork, maps and everyday objects. We go for a look.