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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, workers move a crawler-transporter under NASA's new mobile launcher (ML) support structure. The crawler will transport the ML from a construction site, north of the Vehicle Assembly Building, to the Mobile Launcher east park site. Once there, the ML can be outfitted with ground support equipment, such as umbilicals and access arms, for future rocket launches. It took about two years to construct the 355-foot-tall structure, which will support NASA's future human spaceflight program. The base of the launcher is lighter than space shuttle mobile launcher platforms so the crawler-transporter can pick up the heavier load of the tower and a taller rocket. Photo credit: NASA/Jack Pfaller