What happens to resting diastolic blood pressure as an adaptation to regular aerobic exercise over a long period of time? On the whole, U.S. Unified Combatant Commands have an HQ of their own in one location, subordinate service component HQs, generally one or two co-positioned with the main HQ or generally spread widely, and a variety of operating areas, essential bases, ahead detachments, etc. USAFRICOM initially appears to be considering something slightly completely different