NASA has terminated construction of Mobile Launcher 2, a second mobile launch platform designed for an upgraded version of the Space Launch System that the agency no longer intends to develop. The decision represents a significant shift in NASA's long-term launch infrastructure strategy.
Mobile Launcher 2 was specifically engineered to support an enhanced variant of the SLS rocket system, which would have required different ground support equipment and launch configurations compared to the current SLS Block 1 vehicle. The platform was intended to accommodate the larger and more powerful rocket design.