At over 380 ft. tall and weighing ~10.5 million lbs, the mobile launcher is the ground structure that will be used to assemble, process and launch NASA's Space Launch System and NASA’s Orion Spacecraft from Launch Pad 39B for missions to deep space destinations, such as the Moon, Mars and beyond: | NASA's Kennedy Space Center

NASA - National Aeronautics and Space Administration 's SLS Mobile Launcher 2 tower has gotten a little taller, as teams stacked another module as they continue to prepare it to support future Artemis flights once the SLS block 1B enters service. | NASASpaceflight.com