ISS006-E-46357 (8 April 2003) --- Astronaut Kenneth D. Bowersox, Expedition Six mission commander, emerges from the Quest airlock on the International Space Station (ISS) to begin a session of extravehicular activity (EVA) to perform a variety of maintenance tasks. Astronaut Donald R. Pettit (out of frame), NASA ISS science officer, joined Bowersox on the spacewalk.