T-shirts with messages from victims and witnesses of violence are on display in the lobby of Northbridge High School this week, a display that is open to the public on Thursday from 5 to 7 p.m. The collection of T-shirts, created by teens, illustrates the effect violence has had on their lives and delivers a message they hope will put an end to violence. The project is a porgram of Wayside Youth and Family Support Network.