STS-123 mission specialist Mike Foreman helps to tie down the Orbiter Boom Sensor System on the International Space Station's S1 truss during the mission's final spacewalk on March 22. The structure at the end of the boom is a transmission device for laser imagery and is used when scanning the thermal protection system.
STS-123 mission specialist Mike Foreman helps to tie down the Orbiter Boom Sensor System on the International Space Station’s S1 truss during the mission’s final spacewalk on March 22. The structure at the end of the boom is a transmission device for laser imagery and is used when scanning the thermal protection system.Image Credit: NASA