Railroad enthusiasts, most carrying cameras, form a "photo line" at a railroad crossing near Owosso, Michigan, during Train Festival 2009, waiting for an excursion powered by steam locomotive no. 4449. About 36,000 people attended the four-day event, billed as "America's Largest Celebration of Railroading in 2009." Eight operating steam locomotives were present. The proliferation of cameras underscores the long and important relationship between railroading and photography, which both came to prominence in America during the mid-1800s.