Astronauts Steven L. Smith and John M. Grunsfeld

Astronaut Steven L. Smith, payload commander, prepares to use a 35mm camera during the final spacewalk of the STS-103 mission. Smith stood on a foot restraint connected to the end of Discovery's Remote Manipulator System (RMS) robotic arm. Astronaut John M. Grunsfeld, mission specialist, worked in the background near the Hubble Space Telescope (HST).

Credits: NASA