Russian cosmonauts Alexander Skvortsov (red stripes) and Oleg Artemyev, both Expedition 40 flight engineers, participate in a session of extravehicular activity (EVA) as work continues on the International Space Station. During the seven-hour, 23-minute spacewalk Skvortsov and Artemyev completed installation and experiment tasks outside the station's Russian segment. The ISS Progress 55 resupply vehicle, docked to the Pirs Docking Compartment, is visible at center. The blackness of space and Earth's horizon provide the backdrop for the scene.