Astronauts Take 2nd Spacewalk

Astronauts took another spacewalk at the international space station today, this time to lighten the workload for future crews. As soon as they floated outside, Steven Swanson and Joseph Acaba made their way all the way to the end of the space station's power-grid framework. They loosened bolts holding down batteries that will be replaced on the next shuttle visit in June, and deployed an equipment storage platform, the AP reports.

Other work that was being tackled by the spacewalkers: installing a GPS antenna and using an infrared camera to photograph a pair of radiators, one of which has a peeling cover. It was the second spacewalk in 3 days for the crew of shuttle Discovery. On Thursday, Swanson and another astronaut installed the final pair of solar wings at the orbiting outpost. The panels were unfurled Friday. (More spacewalk stories.)