At NASA's Kennedy Space Center in Florida No. 2 moves along the gravel crawler way.

At NASA's Kennedy Space Center in Florida, crawler-transporter No. 2 moves along the gravel crawler way. The crawler-transporter is undergoing testing at Launch Pad 39A to check out recently completed modifications to ensure its ability to carry launch vehicles such as the space agency's Space Launch System heavy-lift rocket to the pad.

NASA's Ground Systems Development and Operations Program is leading the 20-year life-extension project for the crawler. A pair of behemoth machines called crawler-transporters has carried the load of taking rockets and spacecraft to the launch pad for more than 40 years at NASA’s Kennedy Space Center in Florida. Each weighing six and a half million pounds and larger in size than a professional baseball infield, the crawler-transporters are powered by locomotive and large electrical power generator engines. The crawler-transporters will stand ready to keep up the work for the next generation of launch vehicles to lift astronauts into space. For more information, visit http://www.nasa.gov/exploration/systems/ground/index.html Photo credit: NASA/ Jim Grossmann