Across Afghanistan, Taliban Soldiers Keep Up the Fight
Large swaths of territory across Afghanistan still seem to be in Taliban's grip, even as US military proclaims Taliban a defeated force and Afghanistan in hands of friends; situation in parts of southern and western Afghanistan described; villages nationwide are seeing Taliban soldiers returning home with guns and grievances intact; in areas dominated by ethnic Pashtuns, who constitute bulk of Taliban, former foot soldiers of Mullah Muhammad Omar roam free; some Taliban commanders, allowed to switch sides and keep guns, are switching back and fresh fighting is result (M)