 Forget coal, oil, and natural gas: These businesses are reimagining the energy landscape by turning to nuclear energy as well as the power of the sun, wind, and water. With a history that precedes the Civil War, BWX Technologies has a story that traces its roots to the 1850s and the invention of the water tube boiler. The company recognizes the lions share of its revenue from its nuclear operations segment, which deals in the manufacturing of nuclear reactors for the U.S. military as well as the providing of reactor fuel and elements for research purposes at universities and government laboratories. 