Astronauts go on 2nd spacewalk

Astronauts are out on another spacewalk at the international space station.

Steven Swanson and Joseph Acaba floated outside early Saturday afternoon. They will be handling batteries and antennas, chores that will lighten the workload for future crews. They will also photograph radiators.

Some of the work was added just this past week after a later spacewalk had to be canceled because of shuttle Discovery's repeated launch delays.

The astronauts' work will take them to the far end of the space station's framework, which holds the solar wings. There could be some induced electrical voltage there, but NASA says the risk of shock is small and well within acceptable limits.

On Thursday, Swanson and another astronaut installed the last set of solar wings. The panels were opened Friday.