Former Secretary of State Condoleezza Rice wrote in a new op-ed that the past four U.S. presidents share blame for the crisis in Afghanistan, adding that they all made mistakes that have culminated in the Taliban retaking the country this week. "The past years in Afghanistan have been difficult for every president, our armed forces, our allies and our country. The sacrifices of those who served — and those who died — will forever sear our national memory," Rice wrote in The Washington Post. "Each of us who held positions of authority over those years made mistakes — not because...