ISS space walk. US astronaut Michael Fossum (born 1957) carrying out extravehicular activity (EVA, a space walk), at the International Space Station (ISS). He is part of a crew of seven that travelled to the ISS on the Space Shuttle Discovery to deliver supplies and carry out repairs. Here he is working on the S0 Truss of the ISS, anchored in place with a foot on the Canadarm2 manipulator arm. Photographed on 10 July 2006.