At Union Pacific’s De Soto car shop in Missouri, two men break down a freight car truck to its individual components for rebuilding on September 29, 2011. Here they are removing the springs befo... (more)

A steel wheel rolling along a steel rail is very efficient way to move heavy cargo. Here we see one of those wheels under a tank car, rolling along at about 40 miles per hour as BNSF Railway's Ba... (more)