Next Up Season 21 Episode 7 The 10th Year Anniversary of 9/11 – The rebuilding of Ground Zero // The opening of the National September 11 Memorial September 13th, 2011 Season 21 Episode 5 The 10th Year Anniversary of 9/11: National Security / 9-11 Commission Report / CBS Documentary: “9/11: Ten Years Later†September 9th, 2011
