Carnegie Mellon University has made the cut and will compete in June against 22 other teams in the SpaceX Hyperloop Pod Competition, which is an early step to create a high-speed ground-transportation system. The idea is to approach the speed of sound (767 mph) through a low-pressure tube, or Hyperloop, with help from levitation and solar-powered electromagnetic acceleration. Famed SpaceX founder Elon Musk outlined the Hyperloop concept in his 2013 white paper. About 120 teams, from 1,000 initial entries, met last weekend at Texas A&M University to present their plans for scale-size transit vehicles, or pods, before a panel of SpaceX, Tesla and academic engineers.