Good afternoon, Chicago.

The nearly 30,000 people incarcerated in Illinois prisons may begin having their mail scanned and subjected to other security measures following reports that those incarcerated and staff members who work in state prisons were in danger of being exposed to harmful chemicals from illegal drugs and other substances being smuggled into the facilities.

The stricter security rules, which are being implemented for the next five months on an emergency basis, were quietly imposed a few weeks ago by the Illinois Department of Corrections. They allow, but do not mandate, IDOC to implement a process to electronically scan and digitize incoming mail and print it for a person incarcerated or send it to them electronically. The head of IDOC also would have the authority to exclude incoming mail from the process.

Here’s what else is happening today. And remember, for the latest breaking news in Chicago, visit chicagotribune.com/latest-headlines and sign up to get our alerts on all your devices.

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Veterans, advocates urge National Guard members to resist potentially unlawful Trump orders

As Chicago prepares for federal agents and soldiers to arrive in the city, a group of military veterans, attorneys and advocates urged service members to resist potentially unlawful orders from the Trump administration if deployed.

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• Illinois election officials decline to give Justice Department sensitive voter data
• Should retired police be able to sell marijuana? Alderman says no, blocks dispensary
• Northwestern trustee and husband gift $20 million to Center for Enlightened Disagreement

Chicago tech entrepreneur Eric Lefkofsky has launched six unicorns, building a legacy far beyond Groupon

For most Chicagoans, however, the soft-spoken Eric Lefkofsky remains something less than a household name, a billionaire entrepreneur whose brand is not emblazoned on a skyscraper, despite helping to put the city on the tech world map.

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• Federal court rules it is legal to ban guns from CTA and Metra
• Amazon ends a program that lets Prime members share free shipping perk with users outside household

Chicago Stars will play their 2026 NWSL season at Northwestern’s lakefront Martin Stadium

Stars President Karen Leetzow said Martin Stadium is the right size for a professional women’s soccer team at the moment and its accessibility by train, car or bike is an important factor.

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• Angel Reese wants the Chicago Sky to do more in WNBA free agency: ‘We can’t settle for what we have this year’
• Chicago Cubs center fielder Pete Crow-Armstrong gets the night off against a left-handed pitcher

Holocaust Museum opens Experience360 downtown with hologram stories of genocide — including a Rwandan survivor’s story

The new location is open during the Skokie museum’s renovations and includes its first featured genocide survivor outside of the Holocaust, Kizito Kalima of Rwanda.

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President Donald Trump suggests National Guard could go into New Orleans, a blue city in a red state

“So we’re making a determination now,” the president told reporters in the Oval Office during a meeting with Polish President Karol Nawrocki. “Do we go to Chicago? Do we go to a place like New Orleans, where we have a great governor, Jeff Landry, who wants us to come in and straighten out a very nice section of this country that’s become quite, you know, quite tough, quite bad.”

More top stories from around the world:

• Lorena becomes a hurricane off the western coast of Mexico as Kiko travels over open waters
• Survivors of Maine mass shooting and victims’ relatives sue US government alleging negligence