America was made by the railroads. The opening of the Baltimore & Ohio line--the first American railroad--in the 1830s sparked a national revolution in the way that people lived thanks to the speed and convenience of train travel. Promoted by visionaries and built through heroic effort, the American railroad network was bigger in every sense than Europe's, and facilitated everything from long-distance travel to commuting and transporting goods to waging war. It united far-flung parts of the country, boosted economic development, and was the catalyst for America's rise to world-power...