Dedication, Sept 11, 2011
On the tenth anniversary of the 9/11 attacks, the National September 11 Memorial opened in New York. Designed by the architect Michael Arad, the memorial features two 30-foot waterfalls that line the footprint of the Twin Towers and plunge into the earth, invoking a sense of void and absence where the looming towers once stood. The memorial opened to victims' families on September 11, 2011, and to the public the following day.