Space walk

Mission Specialists Piers Sellers and Mike Fossum conduct the first spacewalk of the STS-121 mission.

Sellers and Fossum installed a device to block the cutter blade on the International Space Station’s mobile transporter. The device will prevent the blade from cutting a power and data cable that links the mobile transporter to the rest of the station. After the installation was complete, they reattached the cable. Their work will allow the mobile transporter to move the robotic arm along the station’s integrated truss structure, once a reel assembly that plays out the cable is replaced during a second spacewalk Monday.

Matt

Image credit: Nasa TV

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