NASA's Expedition 55 astronauts are about to take their first spacewalk

It's only been a few days since a trio of new International Space Station travelers arrived at the orbiting spacecraft that will be their home for the next several months, but they're already getting ready to leave it, albeit on a temporary basis. NASA astronauts Ricky Arnold and Drew Feustel are preparing to take the first spacewalk of Expedition 55, which will see them working on the exterior of the ISS for nearly seven hours straight. As NASA explains in a new blog post, Arnold and Feustel ha...