chicago

Low-Wage Workers Strike And Rally For $15 Wage In Chicago...CHICAGO, IL - APRIL 14:  Demonstrators demanding an increase in the minimum wage to $15-dollars-per-hour prepare to march in the streets on April 14, 2016 in Chicago, Illinois. The demonstrators marched to and protested in front of several locations during a day-long effort to draw attention to low-wage jobs. The demonstration was one of about 300 scheduled to take place nationwide today.  (Photo by Scott Olson/Getty Images)

Scott Olson/Getty

Demonstrators demanding an increase in the minimum wage to $15-dollars-per-hour prepare to march in the streets on Thursday in Chicago, Illinois. The demonstrators marched to and protested in front of several locations during a day-long effort to draw attention to low-wage jobs 

Chicago Police Shoot And Kill Teen On City's West Side...CHICAGO, ILLINOIS - APRIL 12:  Tambrasha Hudson (C) is comforted as she joins demonstrators protesting the shooting death of her son 16-year-old Pierre Loury near the location where he was killed on April 12, 2016 in Chicago, Illinois. Police have said Loury took off running when the vehicle he was in was pulled over by police because it matched the description of a vehicle used in an earlier drive-by shooting. The chase, according to police, ended with an "armed confrontation".  (Photo by Scott Olson/Getty Images)

Scott Olson/Getty

Tambrasha Hudson (C) is comforted as she joins demonstrators protesting the shooting death of her son 16-year-old Pierre Loury near the location where he was killed on Tuesday in Chicago, Illinois. Police have said Loury took off running when the vehicle he was in was pulled over by police because it matched the description of a vehicle used in an earlier drive-by shooting. The chase, according to police, ended with an “armed confrontation”.

CHICAGO, IL - NOVEMBER 24:  Demonstrators confront police during a protest following the release of a video showing Chicago Police officer Jason Van Dyke shooting and killing Laquan McDonald on November 24, 2015 in Chicago, Illinois. Van Dyke was charged today with first degree murder for the October 20, 2014 shooting in which McDonald was hit with 16 bullets.  (Photo by Scott Olson/Getty Images)

Scott Olson/Getty

Demonstrators confront police during a protest following the release of a video showing Chicago Police officer Jason Van Dyke shooting and killing Laquan McDonald in Chicago, Illinois. Van Dyke was charged today with first degree murder for the October 20, 2014 shooting in which McDonald was hit with 16 bullets.

Daredevil Nik Wallenda performs his blidfolded walk along a tightrope between two skyscrapers suspended 500 feet  (152.4 meters) above the Chicago River

Jim Young/Reuters

Daredevil Nik Wallenda performs his blindfolded walk along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois.

Visitors walk through the holiday lights display "ZooLights" at the Lincoln Park Zoo in Chicago, Illinois...Visitors walk through the holiday lights display "ZooLights" at the Lincoln Park Zoo in Chicago, Illinois

Jim Young/Reuters

Visitors walk through the holiday lights display “ZooLights” at the Lincoln Park Zoo in Chicago, Illinois.

An aerial view at night of the downtown Chicago skyline. An Arctic air mass is expected to chill much of the Central Plains and the East Coast through Monday with wind-chill temperatures dropping into the single digits overnight in some places.

Kiichiro Sato/AP

A nightime aerial view of downtown in the US city of Chicago

Lightning strikes the Willis Tower (formerly Sears Tower) in downtown in Chicago, Illinois. A massive storm system with heavy rain, high winds, hail and possible tornadoes is expected to move into Illinois and much of the central part of the Midwest today.

Scott Olson/Getty Images

Lightning strikes the Willis Tower (formerly Sears Tower) on early Thursday morning in Chicago, Illinois. A massive storm system with heavy rain, high winds, hail and possible tornadoes is expected to move into Illinois and much of the central part of the Midwest.