Virgin Hyperloop gave the first ride on its test track Sunday in Las Vegas, but it will be years before 
the public can potentially take a high-speed ride on a hyper loop.Magnetic levitation lifts a train car above a track, as the magnets' like poles push the train upward.Magnetic levitation has been used on some train systems 
since the 1970s.A hyper loop is an unproven transportation system in which people travel in a vehicle in a vacuum 
tube at speeds as high as 600 mph.