"Empty Sky" is the State of New Jersey's official memorial that honors the memory of the 749 people that lived in or had ties to New Jersey that lost their lives at the World Trade Center on September 11, 2001. Located within Official: Liberty State Park, the brushed stainless steel twin walls are 210 feet long, the width of each side of the World Trade Center Towers. They rise 30 feet, standing parallel to each other with a 12-foot wide paved path of bluestone between them. Like the World Trade