do air force nurses work similar hours as civilian nurses, ie, three 12 hour shifts a week? or is it more like MTW 7a-7p, Tr off, FSa 7p-7a, S off? do they work day and night shift depending on staffing needs or are new nurses always night shift...how does that work exactly? or do they work four or five 12s in a row?? just looking for an idea on what the schedule is like!