Protesters blocked traffic to O'Hare Airport Monday morning, causing some anxious travelers to walk to the terminals. Delays begin at Addison Street on the outbound Kennedy Expressway. One person posted a video on X, formerly known as Twitter, of people walking to the airport terminals. The protesters appear to be a pro-Palestine group. Fox 32 News has reached out to Chicago Police and Illinois State Police for more information.This is a developing story. Check back for updates. Read this story