NASA orders astronauts aboard the International Space Station (ISS) to shelter and prepare for a possible evacuation after an air leak problem in the Russian segment worsens. NASA says the leak is located in the transfer tunnel area of the Zvezda Service Module, which includes key station systems such as life support, communications, power distribution, data processing, flight control and propulsion. As a precaution, five astronauts aboard the ISS are directed to prepare for evacuation by entering their Crew Dragon spacecraft and donning spacesuits, while another group shelters inside a transport capsule “out of abundance of caution,” according to the reports. Russian space agency Roscosmos is attempting to repair the leak as station crews follow emergency procedures. After the repair attempt and related safety measures, astronauts move back to normal operations, with five other crew members returning following a period of sheltering during the repair effort. The situation is presented as a technical issue requiring prompt corrective action and contingency readiness, with NASA and Roscosmos coordinating on the repair and the station’s safety protocols.