Our usual montage of sounds and images from the free Saturday night concert series on Chattanooga’s 21st Century Waterfront….”Riverfront Nights”…is replaced this week by a more somber look at the flag ceremony and other rituals connected to the tragic, unthinkable shooting deaths of 5 members of our Armed Forces 3 weeks ago this Thursday. Today, the last of those victims, the lone Sailor among Marines, gunned down at a recruiting station, is laid to rest.