A liquid hydrogen storage tank is in view as NASA's mobile launcher (ML) atop crawler-transporter 2 makes its way up the ramp at Launch Pad 39B on Aug. 31, 2018, at NASA's Kennedy Space Center in Florida. The ML is undergoing 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. Be sure to check out our story tomorrow! We'll be on the ground at NASA Kennedy to give you an in-depth look at Exploration Ground Systems. Credit: NASA/Cory Huston #nasa #groundsystems #sls #rocket #orion #spacecraft #EM1 #amazing #testing #engineering #launchpad #spacecoast