NASA Postpones Spacewalk Due to Crew Member's Medical Concern

High above the Earth, where the margin for error is measured in heartbeats, NASA chose caution over schedule — postponing a planned spacewalk aboard the International Space Station after a crew member reported a medical concern. Astronauts Mike Fincke and Zena Cardman had been set to venture outside the station to prepare a power channel for a new solar panel, a mission that would have marked Cardman's first spacewalk and Fincke's tenth. The agency, honoring a long-standing commitment to medical privacy, declined to name the individual or the condition, saying only that the situation was stabl