Space Shuttle Discovery astronauts repair the International Space Station on spacewalk

Earth is reflected in the helmet visor of NASA astronaut Alvin Drew, STS-133 mission specialist, as he participates in the mission's first session of extravehicular activity, as construction and maintenance continue on the International Space Station. During the six-hour, 34-minute spacewalk, Drew and fellow NASA astronaut Steve Bowen installed the J612 power extension cable, move a failed ammonia pump module to the External Stowage Platform 2 on the Quest Airlock for return to Earth at a later date, installed a camera wedge on the right hand truss segment, installed extensions to the mobile transporter rail and exposed the Japanese 'Message in a Bottle' experiment to space.