Four astronauts will be part of the next mission in the agency’s program to return humans to the surface of the moon by 2028. The recent explosion of a Blue Origin rocket could complicate matters.

NASA says a long-running air leak aboard the ISS recently worsened, leading engineers to investigate new suspected crack locations and consider a riskier repair strategy. Astronauts were temporarily moved into a safe haven as a precaution before the repair was postponed for further analysis.