US space officials are concerned about a leak in the aging International Space Station, specifically in a small Russian PrK module. This module, connecting a larger module to a docking port, has been leaking since September 2019. A new NASA inspector general report reveals the leak rate has increased significantly this year. Despite investigations, the cause remains unknown, focusing on internal and external welds. The plan is to keep the hatch to the PrK tunnel closed, potentially permanently, reducing docking ports. The issue is now classified as high risk by NASA.