Chicago officials are bracing for a massive influx of immigration reform demonstrators into the Loop and Grant Park Monday.
Organizers say they expect up to 500,000 people. More than 100,000 people participated in a similar rally held March 10. Chicago police say they will have extra officers on duty. Many will be clustered in a joint command center where they will monitor the crowd.
The Fire Department says it will have EMS responders divided into two units. Some will occupy a staging area near the site of the rally. Others will remain on standby in case they're needed.
The march is designed to show support for immigration reform and opposition to legislation that would criminalize the actions of an estimated 11 million illegal immigrants.