Astronaut Reid Wiseman shared this image from today's spacewalk tweeting "what an experience." His fellow spacewalker, ESA astronaut Alexander Gerst also tweeted "I do not have words to describe what we did today." The duo worked outside for six hours, thirteen minutes. They installed a degraded pump module on an external stowage platform and an electrical relay system that will provide backup power to the Mobile Transporter, which can move supplies on rails along the station's backbone, and the space station's robotic arm, Canadarm2. Image credit: NASA #spacewalk #iss #exp41 iss #nasa #spacestation