Two astronauts cut short their spacewalk and hurried back to the safety of the international space station after a suit problem resulted in rising carbon dioxide levels for one of the men. NASA officials stressed that spacewalker Christopher Cassidy was never in any danger and experienced no symptoms of carbon dioxide buildup. The trouble cropped up late in Wednesday's spacewalk, the third for shuttle Endeavour's crew. Mission Control notified the crew five hours into the spacewalk that the canister for removing carbon dioxide from Cassidy's suit did not seem to be working properly. Flight controllers wanted him back inside quickly. That meant fellow spacewalker David Wolf had to go back in early, too. Astronauts will walk five times in space without any gravitational force during their 11-day space in space.
.jpg)
