Marion Power Shovel Company

The crawler-transporters, formally known as the Missile Crawler Transporter Facilities, are a pair of tracked vehicles used to transport launch vehicles from NASA's Vehicle Assembly Building (VAB) along the Crawlerway to Launch Complex 39. They were originally used to transport the Saturn IB and Saturn V rockets during the Apollo, Skylab and Apollo–Soyuz programs. They were then used to transport Space Shuttles from 1981 to 2011. The crawler-transporters carry vehicles on the mobile launcher platforms (MLPs) used by NASA, and after each launch return to the pad to take the platform back to the

an American company (1884-1997), which created excavators, drilling rigs for the construction and mining industries, supplied excavators for the construction of the Panama Canal, for NASA