This image shows the core stage for NASA’s Space Launch System (SLS) rocket without scaffolding at NASA’s Michoud Assembly Facility in New Orleans. Assembly and integration of the core stage and its four RS-25 engines has been a collaborative, multistep process for NASA and its partners Boeing, the core stage lead contractor, and Aerojet Rocketdyne, the RS-25 engines lead contractor. NASA and the contractor team used the scaffolding previously positioned around the 212-foot core stage to assess the stage’s inside and check out the electronic systems distributed throughout the stage, including avionics and propulsion systems, that will enable the stage to operate during launch and flight. The team will continue to check out these systems at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, where it will undergo the core stage Green Run testing.