This weekend, the Roebling Wire Works building will be open to thousands of people from across the region for the Trenton Punk Rock Flea Market's two-day Halloween shopping extravaganza, featuring 400 vendors, food trucks, music and even a live skate jam. It's the first time the building has been open to the public for a major event since a late June shooting that left one dead and 22 injured in a gang-related shooting.