A "Back the Blue" march to show support for police will be held in Columbia on Saturday, September 12. The event, organized by resident Angie Brock Floyd, will begin at 2 p.m. at Rotary Park, located at South 2nd and Walnut. Marchers will proceed up Chestnut Street to North 5th, then to Locust Street and down to the police station near the intersection of Locust and Market. Participants are asked to remain on sidewalks and not block vehicle traffic. The event is free and open to the public.