WTC site construction progresses

The Port Authority of New York & New Jersey has unveiled the latest updates at the World Trade Center construction site. Watch the video above to check them out. So far, the video shows, about 95 percent of the 9/11 Memorial steel has been installed, while the subterranean Memorial Museum has taken its first steps toward fruition. One of the most keenly-watched portions of the construction effort, meanwhile, One World Trade Center, has reached the 20th floor in its construction.