The first of four RS-25 SLS (Space Launch System) rocket engines, is installed on the work stand and integrated with the Artemis III core stage rocket on Tuesday, Aug. 25, 2026, inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. During Artemis III, the four RS‑25 engines will launch the Orion spacecraft and its crew of four into low Earth orbit, generating more than two million pounds of thrust at liftoff.