Touching the Sun
During a six-and-a-half-hour spacewalk on August 30, NASA astronaut Sunita Williams finishes the installation of a new switching unit on the International Space Station. The original unit experienced setbacks last week when misaligned parts restricted its movement. (See more space station pictures.)
Astronauts also installed a camera on the space station's arm. After helping to construct the orbiter, so-called Canadarm2 is now being used to capture unpiloted spacecraft in orbit.