The city is in final preparations for the Chicago Marathon this weekend. But will it be safe in light of what happened in Boston? Paris Schutz has the details. View a route map and information on street closures.

We look at the charges against Dzhokhar Tsarnaev. What case can defense attorneys build for the suspect? What constitutional protections does he have? And how do terrorism cases differ from other charges? We have analysis.

Chicago Tonight spoke with local marathon runners to get their reaction to the Boston Marathon bombings.