A system, comprising: a turbine exhaust section, comprising: an exhaust flow path; an outer structure comprising an outer exhaust wall disposed along the exhaust flow path; an inner structure comprising an inner exhaust wall disposed along the exhaust flow path, and an inner cavity disposed between the inner exhaust wall and a rotational axis of a turbine; a bearing assembly disposed in the inner cavity; wherein a turbine exhaust strut is disposed in the exhaust flow path and extending between the inner structure and the outer structure of the exhaust section, wherein the turbine exhaust strut is configured to provide a bi-directional airflow, wherein the turbine exhaust strut comprises: a first portion comprising an inner body having a first flow passage extending between the inner and outer structures (38, 42) configured to flow a fluid in a first direction between inner and outer exhaust walls (80,106) of a turbine exhaust section and into the inner cavity so as to cool the bearing assembly; and a second portion comprising an outer body having a second flow passage configured to flow the fluid (100, 102) in a second direction between the inner and outer exhaust walls (80,106) of the turbine exhaust section, wherein the first and second directions are opposite from one another and the outer body surrounds the inner body, characterized in that the inner structure comprises a bearing support wall, baffles (88, 90) and an aft shaft rotor cavity, wherein the bearing assembly is disposed in the inner cavity inside the bearing support wall and the first flow passage is configured to flow a fluid in a first direction between inner and outer exhaust walls (80,106) of a turbine exhaust section and through the bearing support wall into the inner cavity, the outer structure comprises an outer casing which, with the outer exhaust wall, defines an intermediate outer cavity configured to receive the fluid from the second flow passage and to vent the fluid into the exhaust flow path so as to control the temperature of the outer structure before venting into the exhaust flow path, wherein the inner body is a load-bearing structural support between the bearing support wall and the outer structure, and the outer body is a non-load bearing structural support between the inner exhaust wall of the inner structure and the outer exhaust wall of the outer structure. an exhaust flow path; an outer structure comprising an outer exhaust wall disposed along the exhaust flow path; an inner structure comprising an inner exhaust wall disposed along the exhaust flow path, and an inner cavity disposed between the inner exhaust wall and a rotational axis of a turbine; a bearing assembly disposed in the inner cavity; wherein a turbine exhaust strut is disposed in the exhaust flow path and extending between the inner structure and the outer structure of the exhaust section, wherein the turbine exhaust strut is configured to provide a bi-directional airflow, wherein the turbine exhaust strut comprises: a first portion comprising an inner body having a first flow passage extending between the inner and outer structures (38, 42) configured to flow a fluid in a first direction between inner and outer exhaust walls (80,106) of a turbine exhaust section and into the inner cavity so as to cool the bearing assembly; and a second portion comprising an outer body having a second flow passage configured to flow the fluid (100, 102) in a second direction between the inner and outer exhaust walls (80,106) of the turbine exhaust section, wherein the first and second directions are opposite from one another and the outer body surrounds the inner body, a first portion comprising an inner body having a first flow passage extending between the inner and outer structures (38, 42) configured to flow a fluid in a first direction between inner and outer exhaust walls (80,106) of a turbine exhaust section and into the inner cavity so as to cool the bearing assembly; and a second portion comprising an outer body having a second flow passage configured to flow the fluid (100, 102) in a second direction between the inner and outer exhaust walls (80,106) of the turbine exhaust section, wherein the first and second directions are opposite from one another and the outer body surrounds the inner body,