Before a rocket can blast off into space, it must travel 4.2 miles from the Vehicle Assembly Building to the launch pad at Cape Canaveral, Florida. That’s where NASA’s crawler transporters come in. They are the largest autonomous vehicles on the planet and they are designed to transport rockets to the launch pad. We got a glimpse of how NASA prepares and operates the crawler for the 16 million pound Mobile Launch Vehicle and Space Launch System, NASA’s largest and heaviest rocket to date. .