Astronauts Brave Brief Ammonia Snowstorm As They Conclude Fix To Space Station

Toxic snowflakes in space were just one obstacle astronauts faced down today (Dec. 24) as they successfully replaced an ammonia pump that will, if all goes to plan, put the space station back in full service in a few hours. “They’re just completely surrounding us now,” radioed NASA astronaut Rick Mastracchio of the ammonia flakes […]