Via the BBC:
US-based entrepreneur Elon Musk has unveiled his proposed supersonic "Hyperloop" transport concept to link Los Angeles and San Francisco.
The SpaceX, Tesla and Paypal founder envisions using magnets and fans to shoot capsules floating on a cushion of air through a long tube.
If it is ever built, a Hyperloop trip between the two California cities would last about 30 minutes, he said.