Italian astronaut Samantha Cristoforetti teamed up with Russia's Oleg Artemyev in a spacewalk on Thursday to work on the International Space Station's newest robot arm. Russian cosmonauts typically pair up for spacewalks, although NASA and European Space Agency astronauts occasionally ventured out with them years ago. Despite the turmoil caused by the Ukraine crisis on Earth, the space station's seven residents have repeatedly stressed that they're getting along fine up there. The current crew includes three Americans, three Russians and Cristoforetti.