We get a behind-the-scenes look at the process and history of dyeing the Chicago River green – a city tradition since 1962, and a family tradition since its inception. Meet the men who turn the river bright green each year in this story originally told by John Callaway on March 17, 2004.

Joel Weisman and his panel of journalists discuss the week's top headlines.

Joel Weisman and his panel of journalists assess how serious Cook County Board President Toni Preckwinkle is about challenging Rahm Emanuel for mayor in 2015. Watch the web extra video.

A organic food festival, Chicago's St. Patrick's Day Parade and a benefit party; Chicago Tonight knows what’s going on this weekend.

Watch web extra video clips of the Illinois Republican gubernatorial candidates from the post-forum news conference.

Republican gubernatorial candidates  -- Bruce Rauner, Bill Brady, and Kirk Dillard – gave a brief news conference following the GOP Governor Forum. Read an article.

The Republican candidates for Illinois governor join us for a special one-hour candidate forum, moderated by Phil Ponce. Joining us are Bill Brady, Dan Rutherford, Kirk Dillard and Bruce Rauner. View timelines of the candidates' political careers and a behind-the-scenes slideshow, and read a recap of our live chat.

At the Tuesday, March 18 Primary Election, the Board of Election Commissioners for the City of Chicago will use electronic poll books to check in voters instead of paper poll books. Read an article.

A Cook County judge makes a surprise ruling that he says will end the Burge torture saga once and for all in Chicago. Paris Schutz has the latest.

The Lakeview neighborhood has a unique new place for people who are homeless, and suffer mental illness or disabilities, to call home. Brandis Friedman takes a look inside. Read an article and watch a web extra video.

Demand for locally produced, organic foods has never been stronger. We talk with a Chicagoan who is seen as a leader of the so-called Good Food Movement: Jim Slama, the founder and president of FamilyFarmed.org. Read an interview with The Organic Gardener founder, Jeanne Nolan, and take a QUIZ to test your knowledge on USDA organic regulations.

We share what you had to say about our conversation with Illinois Deputy Governor Cristal Thomas and director of the Illinois Department of Public Health, Dr. LaMar Hasbrouck, about the number of state residents enrolled and the final month of the Affordable Care Act when we read some of our viewer feedback.

New at the museum -- two solo exhibitions feature a pair of female contemporary Indian artists.

Paris Schutz reports on why some powerful unions are urging Democratic members to cross over and vote Republican in next week’s gubernatorial election. Read an article.

We take a look at a new study that says Alzheimer’s is the third leading cause of death with one of the study’s researchers, Bryan James of Rush Alzheimer’s Disease Center. Read the full study, an article about super-agers, and view a graphic on Alzheimer's disease.