STS102-321-013 (8-21 March 2001) --- Sandwiched between the extravehicular mobility unit (EMU) space suits, astronauts James S. Voss (left) and Susan J. Helms, both Expedition Two flight engineers, are photographed in the shuttle airlock of the Earth-orbiting Space Shuttle Discovery. Voss and Helms were involved in the first of two space walks performed on the STS-102 mission while docked with the International Space Station (ISS).