Teams with NASA’s Exploration Ground Systems Program pose for a photo in front of the upper stage for the agency’s Artemis II SLS (Space Launch System) rocket inside the Multi-Payload Processing Facility (MPPF) at NASA’s Kennedy Space Center in Florida on Wednesday, April 16, 2025. Visible in the background is also the Artemis I Orion crew module, now known as the Orion Environmental Test Article (ETA). Technicians fueled the SLS upper stage, known as the interim cryogenic propulsion stage, with hydrazine for its reaction control system at the MPPF before its transportation to the spaceport’s Vehicle Assembly Building and will now integrate the four-story propulsion system with SLS rocket elements atop mobile launcher 1.