Stock Photo - Russian cosmonaut Oleg Skripochka, Expedition 26 flight engineer, wearing a Russian Orlan-MK spacesuit, participates in a session of extravehicular activity (EVA) focused on the installation of two scientific experiments outside the Zvezda Service Module of the International Space Station. During the four-hour, 51-minute spacewalk, Skripochka and Russian cosmonaut Dmitry Kondratyev (visible in the reflections in Skripochka's helmet visor), flight engineer, installed a pair of earthquake and lightning sensing experiments and retrieved a pair of spacecraft material evaluation panels.