The SLS Mobile Launcher is illuminated by floodlights as preflight testing of Artemis 2’s ground support equipment continues. Credit: Jeff Seibert/AmericaSpace. If you are an astronaut, the Emergency Egress System (EES) is the most fun ride which you hope you never need to take.  These systems have taken many forms over the 63-year saga of American human spaceflight, from cherry pickers to ejection seats to inflatable slides.  However, they all serve a common purpose: to rapidly transport astro...