The image is a black and white map of the Chicago Radar at 5 PM CST on April 21, 1967. The map is divided into three sections - WI, MI, IL, and IN. The WI section is on the left side of the map, with the MI section on the right side and the IL section in the center. The IL section is in the middle, with a large area of black ink splattered across it. The IN section is slightly larger than the WI section. The background of the image is white, and the map appears to be old and worn. The text on the image reads "Chicago Radar" and "April 21 1967".