Standing in front of one of NASA Kennedy Space Center's crawler transporters are Rick Drollinger left and Phllip Koehring Jr.

Standing in front of one of NASA Kennedy Space Center’s crawler transporters are Rick Drollinger (left) and Phllip Koehring Jr., who both represent their fathers for their roles in the development of the crawlers. The occasion was the 40th anniversary of the crawlers. Drollinger’s father, Richard, was director of engineering at Marion Power Shovel Co. in Ohio where the crawlers were initially built in 1965. Koehring’s father, Philip Sr., was project manager at Marion. Alongside Koehring are his brothers Doug and John. Media representatives and invited guests had the opportunity to tour one of NASA's two crawlers. This included the driver cab and engine room. Guests included current drivers and operators, as well as drivers from the Apollo Program. In January 1966, the crawler completed its first successful move with a 10.6-million-pound launch umbilical tower. It moved three-quarters of a mile in about nine hours. Throughout 40 years of service, the two crawlers have moved more than 3,500 miles and carried seven vehicles.