Saturday is the ninth anniversary of the Sept. 11 terrorist attacks.Nine years is a long time. Preteen and younger children have no firsthand memories of the events, but for everyone else, the images of those crumbling World Trade Center towers in New York remain raw and vivid, a scar on the collective American psyche. Many will mark the moment in solitude, but it’s an anniversary that should be a shared experience.To that end, Covington First United Methodist Church, 1113 Conyers St., will play host to a service of remembrance at 10:30 a.m. Saturday in the main sanctuary.