ESA astronaut Hans Schlegel (left) and NASA astronaut Rex Walheim (right) prepare for the second spacewalk of the STS-122 mission. They were helped into the EVA spacesuits by Station Commander Peggy Whitson and Shuttle Commander Steve Frick (pictured centre). Schlegel and Walheim spent 6 hours, 45 minuntes outside the Station - their main task was the replacement of a nitrogen tank on the P1 truss.