The right-hand aft assembly solid rocket booster segment for NASA’s Artemis III SLS (Space Launch System) rocket arrives at the agency’s Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Thursday, July 9, 2026, ahead of stacking on top of the mobile launcher for the Artemis III mission. The twin boosters, manufactured by Northrop Grumman in Utah, will provide more than 75 percent of the SLS rocket’s total thrust at launch. The Artemis III mission will launch crew in the Orion spacecraft on top of the SLS rocket to test rendezvous and docking capabilities between Orion and commercial spacecraft needed to land astronauts on the Moon.