On June 5, 2026, NASA ordered five astronauts aboard the ISS to shelter in a docked Crew Dragon, prepared to abandon station due to a worsening air leak in the Russian Zvezda PrK tunnel. The alert lifted after ninety minutes, but the episode highlighted the ISS’s advanced age—a post-Cold War symbol now exhibiting structural fatiguestructural fatigue/ˈstrʌktʃərəl fəˈtiːɡ/L3结构疲劳：材料在反复应力作用下逐渐累积损伤，最终导致裂纹或断裂的现象。The progressive and localized structural damage that occurs when a material is subjected to cyclic loading, leading to crack formation and eventual failure.. Fine cracks cause the leak; no permanent fix exists. NASA and Roscosmos dispute severity: Roscosmos downplays risk, NASA sees elevated danger, warning of catastrophic failurecatastrophic failure/ˌkætəˈstrɒfɪk ˈfeɪljər/L3灾难性故障：导致系统完全毁坏、功能丧失或造成重大人员伤亡的突发性失效。A sudden and complete breakdown of a system or structure, resulting in total loss of function, extensive damage, or loss of life..
In early June 2026, new cracks emerged and leak rates escalated, prompting Roscosmos to propose two successive repair plans—first drilling into the hull, then sawing a load-bearing bracket—both deemed imprudentimprudent/ɪmˈpruːdənt/L3轻率的、不谨慎的：缺乏对潜在风险的考虑，做出不明智的决定。Not showing care for the consequences of an action; rash or unwise, especially in a situation requiring caution. by NASA. The agency ordered astronauts into the Crew Dragon as a precaution; Roscosmos subsequently abandoned both plans and sealed the tunnel. Yet the underlying structural vulnerability remains, a stark reminder that space stations demand ongoing maintenance, a lesson private operators cannot ignore. This episode highlights the fraying consensus between the partners.
The ISS was never meant to be immortal; commercial replacements were expected, but the leading contender, Vast’s Haven-1, offers only an eighth of the living space, depends on a docked capsule, and is unlikely to launch before 2027. Full replacements like Haven-2, Axiom’s station, and Starlab Space’s outpost remain years away, with Axiom facing financial trouble. Faced with a nascentnascent/ˈneɪsənt/L3初生的、新生的：刚刚开始形成或发展，尚未成熟。Just beginning to develop or come into existence; in an early stage of growth or formation. private sector and stalled procurement, US lawmakers extended ISS operations to 2032, tying retirement to replacement readiness and warning against ceding low Earth orbit to China. This extension provides a temporary patch but underscores the fundamental problem of who pays.
Decommissioning the 420-tonne station via controlled re-entry over Point Nemo using an adapted SpaceX Dragon will cost roughly US$840 million. The legal landscape is messy: under the 1972 UN Liability Convention, multiple launching states are jointly and severally liable for any damage. If debris strikes a populated area, liability is absolute; if it damages a satellite, fault must be proved—a daunting prospect. The air leak underscores that perpetual maintenance is imperative, and with no obvious paying customers beyond government agencies, investor reticence is understandable. Extending the ISS provides a temporary patch, but the fundamental question of who pays remains unresolved.
