Spacewalking Astronauts Begin Upgrades for Commercial Spacecraft | Video

Space station astronauts Shane Kimbrough of NASA and Thomas Pesquet of the European Space Agency took a spacewalk on March 24, 2017 to begin preparing the orbital outpost for the arrival of commercial spaceships. During the spacewalk, which lasted 6 hours and 34 minutes, Kimbrough upgraded an external computer and disconnected the Pressurized Mating Adapter-3 to prepare for its relocation. Meanwhile, Pesquet investigated an ammonia leak and greased up machinery on the space station's robotic arm. [Read the full story]