Shuttle astronauts complete 6-hour spacewalk

A pair of astronauts from the space shuttle Discovery safely completed a six-hour spacewalk outside the International Space Station on Thursday, installing a set of solar panels that will help the station handle twice as many crew members. Astronauts Richard Arnold and Steve Swanson bolted into place solar arrays that will be the last piece of the station's expanded power system. More

(Source: CNN.com - Mar 20)