An curved arrow pointing right. Rockets can't just drive themselves to the launchpad — so NASA has two of the biggest vehicles ever built to get them there. Weighing in at 6 million pounds, the ...

In the late 1970s, NASA faced a major dilemma: the Space Shuttle program was behind schedule ... touring the facility and learning about the "crawler," the massive vehicle used to transport ...

Before a rocket can blast off into space, it must travel 4.2 miles from the Vehicle Assembly Building to the launchpad in Cape Canaveral, Florida. That's where NASA's crawler-transporters come in.