NASA ISS Astronaut Sunita Williams: Toothbrush and Main Bus Switching Unit Installed during EVA

NASA astronaut Sunita Williams, Expedition 32 flight engineer, participates in the mission's third session of extravehicular activity (EVA).

During the six-hour, 28-minute spacewalk, Williams and Japan Aerospace Exploration Agency astronaut Aki Hoshide (out of frame), flight engineer, completed the installation of a Main Bus Switching Unit (MBSU) that was hampered last week by a possible misalignment and damaged threads where a bolt must be placed.

The toothbrush that helped fix Space Station. Suni and Aki took it outside to clean a fouled bolt.

They also installed a camera on the International Space Station's robotic arm, Canadarm2. The thin blue line of Earth's atmosphere and the blackness of space provide the backdrop for the scene.

Credit: NASA