Astronauts stepped out the space station to install new antennas and through out a small five-kilogram satellite into space.

The crew - Leroy Chiao and Salizhan Sharipov are on a six-month mission in space and they are scheduled to return to Earth on April 25 2004. During tha last few months this is their second time to leave the space station empty. Last time they took spacewalk was in January.

There have been a number of different breakdowns on the space station in the last weeks.