Brendan Sullivan of Bloomington, IL, holds up a U.S. flag with a peace symbol during a May Day march on W. Washington Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

Chicago police protect the entrance of the Bank of America where Occupy Chicago gathered in protest. | Natasha Korecki~Sun-Times

Occupy Chicago May Day protest in the Loop Tuesday, May 1, 2012, | Natasha Korecki`Sun-Times

Occupy Chicago protesters outside Bank of America on State St. in the Loop Tuesday, May 1, 2012. | Natasha Korecki~Sun-Times

Occupy Chicago May Day protest in the Loop, Tuesday, May 1, 2012. | Natasha Korecki~Sun-Times

Occupy Chicago May Day protest in the Loop, Tuesday, May 1, 2012. | Natasha Korecki~Sun-Times

Occupy Chicago May Day protest in the Loop, Tuesday, May 1, 2012. | Natasha Korecki~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

Chgo Police line up on Randolph to move the May Day protest off of Randolph to the sidewalk. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

Chgo Police protect a Bank of America branch as the May Day protest stops to protest the B of A. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves west on Washington past Dearborn. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves west on Randolph. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

May Day protest moves through the downtown area. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

Chicago police protect the entrance of the Bank of America where protesters gathered. Tuesday, May 1, 2012. | Brian Jackson~Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady (in red) is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady (in red) is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady (in red) is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady (in red) is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

May Day protestors wave to police inside the Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Occupy Chicago May Day protest in the Loop, Tuesday, May 1, 2010. | Brian Jackson~Sun-Times

Occupy Chicago May Day protest in the Loop, Tuesday, May 1, 2010. | Brian Jackson~Sun-Times

Occupy Chicago May Day protest in the Loop, Tuesday, May 1, 2010. | Brian Jackson~Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protest moves through the downtown area of Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chicago Police protect a Bank of america as the May Day protest stops to protest a Bank of America in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A lady (in red) is upset because she is not able to enter Bank of America because the owners closed it due to the protest action in the loop on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Mayday protest as they move east on Jackson towards the Federal Plaza for a rally. Tuesday, May 1, 2012. | Brian Jackson~Chicago Sun-Times.

Mayday protest as they move east on Jackson towards the Federal Plaza for a rally. Tuesday, May 1, 2012. | Brian Jackson~Chicago Sun-Times.

Mayday protest as they move east on Jackson towards the Federal Plaza for a rally. Tuesday, May 1, 2012. | Brian Jackson~Chicago Sun-Times.

Immigration protest follows Occupy Chicago protest as they all move east on Jackson towards the Federal Plaza for a rally. Tuesday, May 1, 2012. | Brian Jackson~Chicago Sun-Times.

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

A Rahm Emanuel button worn by one of May Day protestors, who arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

The May Day protestors arrived at Federal Building Plaza at Dearborn and Adams in Chicago on May 1, 2012. | Al Podgorski~Chicago Sun-Times

Chris Trudeau and Joann Trudeau kiss during a rally at Union Park before marching to a rally at the Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

A police officer helps a fellow officer put on her rain poncho during a rally and protest at Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Chicago Police Supt. Garry McCarthy and Assistant Deputy Supt., left, oversee the start of a march from Union Park to the Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

People gather and step over puddles at Federal Plaza after marching from Union Park in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Protesters dance at Federal Plaza after marching from Union Park in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Protesters enter Federal Plaza after marching from Union Park in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Women take pictures with their cell phones of protesters moving east on W. Jackson Blvd. during a march in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Joel Fromer hands people flowers at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Dalton Anthony Jones reaches for his son, Nomad Zephyr Jones, 1, at Federal Plaza during a rally in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

A police officer and a protester walk side-by-side during a May Day march on W. Washington Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Protesters hold up signs while walking east on W. Washington Blvd. during a May Day march on W. Washington Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Employees of a chicken fast food restaurant watch marchers from outside the storefront during a May Day march on W. Jackson Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Protesters stand at an overpass during a May Day march on W. Jackson Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Protesters stand outside the Chicago Board of Trade building during a May Day march on W. Jackson Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Tim Novack rests his mannequin head at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Two men have a discussion while listening to speakers at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Maddie Sullivan of Naperville wears a mask while holding her boyfriend's hand at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Greg Lambert of Indianapolis, IN, wears a mask at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Juan Munoz wears a construction helmet at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Activist Andy Thayer talks with protesters at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

People look out of a business office window on S. Des Plaines St. at marchers on their way to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

People atop an outdoor atrium at the Willis Tower watch marchers head to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

A protester photographs Chicago police officers on bicycles at the Chicago Board of Trade building during a May Day march on W. Jackson Blvd. Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Richie McGillen of Kankakee, IL, wears a handkerchief over his face at Union Park before marching to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Bernardine Dohrn and her husband, Bill Ayers, walk through Union Park on Tuesday before a march to Federal Plaza in commemoration of May Day. | John J. Kim~Sun-Times

Protesters begin their march at Union Park towards Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Bill Ayers applauds a musical performer at Union Park before a march to Federal Plaza in commemoration of May Day Tuesday, May 1, 2012, in Chicago. | John J. Kim~Sun-Times

Protest preview: May Day protesters offer a hint of what NATO protests will be like. | Brian Jackson~Sun-Times