Engineers are welding the core stage structures for the Artemis III mission, which will land the first woman and the next man on the lunar surface, through a process called friction stir welding. Each of the structures for the core stage has rings that attach the pieces together to produce one stage during final assembly. The rings are trimmed down to 1/1000th of an inch at the ring machining center then sent to another part of the facility for the next phase of manufacturing. Assembling the 5.5-million-pound SLS rocket for the Artemis missions takes special tools and is a collaborative effort between NASA and Boeing, the lead contractor for the core stage. The manufacturing progress for Artemis II and III comes as the first core stage for the SLS rocket undergoes Green Run testing at NASA’s Stennis Space Center in Bay St. Louis, Mississippi. NASA is working to land the first woman and the next man on the Moon by 2024. The SLS rocket, NASA’s Orion spacecraft, Gateway, and human landing system are part of NASA’s backbone for deep space exploration. The Artemis program is the next step in human space exploration. It’s part of America’s broader Moon to Mars exploration approach, in which astronauts will explore the Moon. Experience gained there will enable humanity’s next giant lap: sending humans to Mars. SLS is the only rocket that can send Orion, astronauts, and supplies to the Moon in a single mission.