In the wake of the Civil War (1861-65), America became increasingly aware of its history, including railroad history. This awareness translated into preservation of some early railroad artifacts and sites, including donation of the locomotive "John Bull" to the Smithsonian Institution in 1885. The federal government made preservation an official goal with the National Historic Sites Act of 1935, which established the program of National Historic Landmarks. In 1966, Congress and the President authorized the National Register of Historic Places through the National Historic Preservation Act, which incorporated the earlier Landmarks program. For nearly a century earlier, uncounted private and public museums and organizations around the country had been gathering, preserving and sometimes restoring important buildings and artifacts associated with railroading. The replica of the Best Friend of Charleston (record 971) is a case in point. These efforts accelerated after 1966 and were not confined to metropolitan areas, but very often occurred in small towns with strong railroad associations. In East Troy, Wisconsin, the Electric Railroad Museum operates on seven miles of original Milwaukee Electric Railway & Light Company trackage dating back to 1907. No TMER&L equipment exists there, but the museum has acquired retired cars from the Chicago South Shore & South Bend, as pictured here, and other Midwestern interurban cars. The line is connected with the Canadian National at the Mukwonago, Wisconsin, interchange, and it still carries a small amount of commercial freight. The village of East Troy bought this short stretch in 1939; in 1972, a museum opened; the Friends of the East Troy Railroad Museum, Inc., has operated it since 2000. Notably, the museum operates its equipment on a stretch of original interurban track--an unusual feature among railroad museums. The South Shore, which celebrated its centennial in 2008, still runs electric interurban trains (operated by the Northern Indiana Commuter Transportation District) from Chicago to South Bend. The California State Railroad Museum, Sacramento, is the most visited museum. The White Pass & Yukon, Skagway, Alaska, is North America's busiest tourist railroad and an International Historic Civil Engineering Landmark, carrying 461,388 passengers in 2007.