Eight Irish tracklayers put down 3,520 rails, while other workers laid 25,800 ties and drove 28,160 spikes in a single day. On May 10, 1869, at Promontory Summit, Utah, a golden spike was hammered into the final tie. The transcontinental railroad was built in six years almost entirely by hand.
D. <span>Because U.S. citizens have used direct democracy to force the courts to embrace certain interpretations of the Bill of Rights</span>