NASA is considering replacing SpaceX as the contractor for the Artemis III moon landing mission due to concerns about SpaceX's delays in developing the Starship lunar lander. Acting NASA Administrator Sean Duffy indicated that the agency may open the contract to other companies, including Blue Origin, to ensure the U.S. can land astronauts on the moon before China. The timeline for this decision is uncertain, but NASA has requested plans from both SpaceX and Blue Origin to expedite development.