The image shows a scene from the 2021 Chicago Marathon, with a focus on a barricade set up to control the crowd. The barricade is made of green plastic sheets and is positioned in front of a group of people, likely participants or spectators. The crowd appears to be moving around the barricade, indicating that it is a busy event. The setting suggests an urban environment, possibly a city street or a park, given the presence of greenery and the barricade. The image captures the dynamic nature of the marathon event, with people moving through the barricade and the green plastic sheets serving as a temporary barrier.