Commentary Kabul has fallen. Twenty years after Sept. 11, 2001, when Osama Bin Laden orchestrated the deaths of almost 3,000 people in the United States, and George W. Bush invaded Afghanistan to enforce the law against unrepentant terrorism by the Taliban and al-Qaeda, America’s mission in the country is coming to a humiliating end. For now. Americans, British, Australians, and Indians are scrambling to get out. But the airport in Kabul where I contributed to the war effort for a year and a half, from 2011 to 2013, is now impenetrable for the regular Afghans, including over 3 million peacefully religious Sufis, who fear massacre at the hands of extremist Taliban fighters in the street. The Taliban is going door-to-door looking for foreigners. Thousands are “sheltering in place,” per the instructions of their home governments, rather than risk arriving at the airport before their time, and being engulfed by the …