The everyday terrorism of urban gun violence

Just over a week ago, 17-year-old Raekwon Brown was fatally gunned down just steps from Jeremiah Burke High School in Dorchester, where he was a student. Three others, including a 67-year-old woman, were wounded. The shooting, which took place in broad daylight after a fire alarm emptied students onto the street near the school, was a reminder of the daily toll of urban gun violence -- and of the terrorism-like quality it often has, as a calm and seemingly ordinary moment suddenly turns to a mini-war zone.