Hyperloop high-speed system tested in the Nevada desert

An early test of Hyperloop - a proposed high-speed transport system - has accelerated a sled to 116 mph (187km/h) in 1.1 seconds in the Nevada desert.

The idea was first pitched by Telsa co-founder Elon Musk in 2013.

It is hoped that the system will be able to start moving cargo by 2019 and people by 2021.