U.S. special operations forces in Afghanistan are preparing for a possible expanded role as overall U.S. forces start to withdraw after a decade of war, the chief of U.S. Special Operations Command said. Admiral Bill McRaven said the Obama administration is considering handing more of the Afghan war responsibility to a senior special operations officer. The plan calls for special operations forces to be the last to leave the country. But he said no final decisions have been made. Special operations would combine targeting and training operations under the plan for an expanded role, the admiral said.