The 9/11 Memorial is a tribute of remembrance, honoring the 2,977 people killed in the terror attacks of September 11, 2001 at the World Trade Center site, near Shanksville, Pennsylvania, and at the Pentagon, as well as the six people killed in the World Trade Center bombing on February 26, 1993.The 9/11 Memorial is located at the site of the former World Trade Center complex and occupies approximately half of the 16-acre site. The Memorial’s twin reflecting pools are each nearly an acre in size and feature the largest man-made waterfalls in North America.