U.S. Southern Command is preparing proposals to overhaul its Miami headquarters to make room for civilian agencies to work alongside military officials, designing a new approach to planning with the State Department and other federal agencies that could become a model for other combatant commands. In August, Deputy Defense Secretary Gordon England designated the transformation of SOUTHCOM into a structure with more interagency flavor one of the Pentagon's top-25 priorities, an effort that senior brass say is well under way...