These images capture the final booster motor segments for NASA’s Artemis III mission departing Northrop Grumman’s Railyard Shipping Facility in Corinne, Utah, June 2. The eight segments will form the twin five-segment solid rocket boosters for the agency’s SLS (Space Launch System) rocket, providing more than 75% of the vehicle’s total thrust at liftoff. Due to their immense size and weight, the booster segments are transported in specialized carriers and are being hauled by Union Pacific Railroad’s newest commemorative locomotive, No. 4547. Marking its inaugural mission, the locomotive will deliver the flight hardware to NASA’s Kennedy Space Center in Florida, where stacking operations for Artemis III are set to begin later this year.