WS of red hot piece of steel rail passing through a machine, being finished and cut. CU of the steel being cut by a giant saw blade. Two workers remove a section of the finished steel to be tested in the lab. CU of the workers placing it out of the way, using it to heat up some coffee. CU of more steel being cut. CU of the worker taking a coffee break with a fellow worker. MS of workers compressing a column of hot steel. CU of the steel being pounded into shape. MS of workers. CU of the steel being pounded into shape. MS of workers. VO of narrator describing the process and how essential iron is to a vast network of human industries.