Decades of work to clean the Chicago River culminated with the first swim in almost 100 years. It was the latest sign of how the city’s relationship with its river has changed.

Group participates in previously unthinkable mile-long swim after US made key progress to clean polluted rivers

Decades of work to clean the Chicago River culminated with the first swim in almost 100 years. It was the latest sign of how the city’s relationship with its river has changed.

For the first time in nearly a century, hundreds of swimmers plunged into the Chicago River over the weekend. Here's why.