The head of NASA is restructuring the US lunar program, with the second "Artemis" mission now planned to orbit the Moon, delaying the surface landing to the fourth flight.

Jared Isaacman, the new NASA administrator, has stated reasons for the agency's shift, including abandoning the modernization of the SLS rocket. The readiness of the Orion and Starship spacecraft is also under scrutiny.

Space expert Igor Afanasyev has provided analysis on these developments.