NASA astronaut Steve Swanson is pictured during a spacewalk to replace a failed backup computer.
ISS039-E-014846 (22 April 2014) — NASA astronaut Steve Swanson is pictured during a spacewalk to replace a failed backup computer relay box in the S0 truss of the International Space Station on April 22, 2014. He was accompanied on the spacewalk by fellow Flight Engineer Rick Mastracchio of NASA.