War in Afghanistan

Gen. John Nicholson, center, during the change of command ceremony in Kabul, Afghanistan, on Sunday.Credit Credit Massoud Hossaini/Associated Press KABUL, Afghanistan — When American Airlines Flight 77 struck the Pentagon on the morning of Sept. 11, 2001, Lt. Col. John W. Nicholson Jr. survived by chance. That morning, as dozens of his colleagues were killed, he was…