Construction work is progressing on 4 World Trade Center (foreground) as seen in this picture from March 3, 2010. Silverstein Properties, the developer, began work on the building in February 2008. The construction is now visible above street level. The building is expected to achieve LEED Gold status when it opens by 2012. For more information on 4 World Trade Center or any other construction projects, visit the Lower Manhattan Construction Command Center at http://www.lowermanhattan.info Also visible in the background of this picture is the ongoing work at 1 World Trade Center, where steel has risen 200 feet above grade.