A technician watches as the ignition overpressure water system pipe on the mobile launcher slowly aligns with the pipe on the ground system at Launch Pad 39B at NASA's Kennedy Space Center in Florida, on Aug. 31, 2018. The ML, atop crawler-transporter 2, made the trek along the crawlerway to the pad for a fit check and several days of systems testing. The 380-foot-tall mobile launcher is equipped with the crew access arm and several umbilicals that will provide power, environmental control, pneumatics, communication and electrical connections to NASA's Space Launch System (SLS) and Orion spacecraft. Exploration Ground Systems is preparing the ground systems necessary to launch SLS and Orion on Exploration Mission-1, missions to the Moon and on to Mars.