NASA managers cut short today's routine spacewalk by two Endeavour astronauts because one of their carbon dioxide sensors stopped working. The astronauts were nearly five hours into a planned six-and-a-half hour spacewalk at the International Space Station when mission controllers noticed that Gregory Chamitoff's spacesuit sensor wasn't working.
Though carbon dioxide levels were probably not too high, the decision to halt the spacewalk was made because of the lack of information. Chamitoff and spacewalking partner Drew Feustel were about to start a 45-minute task to finish installing an antenna on the space station, but controllers figured that would take too much time. They started clean-up tasks instead. (Click to read about yesterday’s installation of a $2B magnet on the Space Station.)