Almost two decades after Al Qaeda's 9/11 attacks on the American homeland, the United States has—for now —disengaged militarily from Afghanistan. A surge of 100,000 U.S. troops into Afghanistan in 2010 was unforeseeable in 2001, as was a Taliban victory twenty years hence. Karl Eikenberry, former U.S. Ambassador to Afghanistan and commander of Coalition forces there, will assess America's strategy in Afghanistan and the implications of the U.S. military withdrawal for international security.