Watch NASA Spacewalk LIVE as NASA astronaut Anil Menon and Canadian Space Agency (CSA) astronaut Joshua Kutryk step outside the International Space Station (ISS) to install and deploy an International Space Station Roll-Out Solar Array (IROSA). The spacewalk, also known as an extravehicular activity (EVA), is part of ongoing efforts to upgrade the ISS power system and support scientific research and operations aboard the orbiting laboratory.