S123-E-008742 (22 March 2008) --- Astronaut Robert L. Behnken, STS-123 mission specialist, participates in the mission's fifth and final scheduled session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the spacewalk, Behnken and astronaut Mike Foreman (out of frame), mission specialist, attached the shuttle's Orbiter Boom Sensor System (OBSS) to the S1 truss on the station, released launch locks on two of the Harmony module's common berthing mechanisms and install trunnion covers on the Japanese Logistics Module -- Pressurized Section. The spacewalkers also performed other tasks including an inspection of the starboard Solar Alpha Rotary Joint (SARJ) and installed the Materials International Space Station Experiment 6 (MISSE-6) on the outside of the European Space Agency's Columbus laboratory.