A debate is brewing over the Chicago Police Department's use of an algorithm they say identifies people who are most likely to shoot someone or be shot themselves. We hear from all sides.

Geoffrey Baer tracks down answers for three questions about Chicago's bygone streetcar heyday. 

We check in with the Chicago Public Library chief about being named in Fast Company's 100 “Most Creative People in Business” and what books he's taking to the beach this summer.

Mayor Rahm Emanuel lauded lawmakers who voted to override Gov. Bruce Rauner's veto of a pension bill that relieves some short-term pressure on city taxpayers. But what does it mean in the long term?

A whistleblower lawsuit filed by two police officers claim that Chicago police have a “code of silence.” We discuss whether the code exists with our guests.

Ron Magers signs off Wednesday night after 51 years in television news, including almost 35 in Chicago. He started here at WMAQ-Channel 5, where he co-anchored with “Chicago Tonight” host Carol Marin for 13 years. In April, Magers sat down for a conversation with his former “TV wife.”

Pack a book because those long, soul-crushing lines at O’Hare and Midway airports aren’t going away any time soon. We look at what this means for the future of the TSA.

Mayor Rahm Emanuel proclaimed May 19 "Lorraine Hansberry Day" in Chicago. We take a look at various events around the city honoring the Chicago playwright and her legacy.

City Planning and Development Commissioner David Reifman discusses two big redevelopment projects and the mayor's neighborhood investment initiative to help struggling neighborhoods on the South and West Sides.

Her nicknames included "Sassy" and the “Divine One," but whatever you called her, Sarah Vaughan was an exceptional voice. On Friday, the CSO pays tribute to her with performances by the Chicago Jazz Orchestra and three vocalists, including Ann Hampton Callaway.

Will you be able to own a piece of the Tribune Tower? Crain's Chicago Business has the story.

Geoffrey Baer tackles three questions about Chicago's beloved rapid transit system, including the various spellings of the system, in this encore edition of Ask Geoffrey.

Meet two men who think gondolas and lights will give a significant boost to Chicago tourism.

Public officials are blasting the Transportation Security Administration as security lines at Chicago's airports – and airports around the country – have swelled to two- and three-hour wait times. What accounts for the spike, and what happens as the summer travel season approaches?

He's best known for having killed Pluto, but astronomer Mike Brown may have found a replacement planet in the outer reaches of our solar system and it forms the basis of a new Adler Planetarium show.

If you're in search of great beer in Chicago, a new interactive website can help. The founders of Chicagos.Beer join "Chicago Tonight" to explain.