It started as a fanciful idea straight out of science fiction, but theHyperloop is starting to pick up real speed. The Hyperloop is Elon Musk's vision for a train that can move passengers and cargo between cities at speeds of more than 700 miles per hour. The plan, unveiled in 2013, calls for pressurized, above-ground tubes that span hundreds of miles. http://money.cnn.com/2015/08/20/technology/hyperloop-elon-mu...