Today's space walk was the second of three planned for the 12-day mission.

So somebody out taking a space walk will see the light flashing every second.

Then, in another space walk, they would try to patch it.

Wednesday's space walk was America's longest and perhaps its most dangerous.

He couldn't even remember the last time he had taken a space walk.

Still, every space walk is something of a venture into the unknown.

It will be the first space walk by American astronauts since 1985.

And she was drifting away, like an astronaut on a space walk.

Private experts say today's space walk was the 100th of the space age.

The space walk should take no more than half an hour.