Astronaut Susan J. Helms works while holding onto a rigid umbilical and with her feet anchored to the remote manipulator system (RMS) robot arm on the Space Shuttle Discovery. This extravehicular activity (EVA), on which Helms was joined by astronaut James S. Voss (out of frame), was the first of two scheduled STS-102 space walks. The pair, destined to become members of the Expedition Two crew aboard the station later in the mission, rode aboard Discovery into orbit and at the time of this EVA were still regarded as STS-102 mission specialists. STS-102 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle Discovery and launched from Kennedy Space Center, Florida. STS-102 flew in March 2001; its primary objectives were resupplying the ISS and rotating the Expedition 1 and Expedition 2 crews.