VIDEO: Robot pack mule unveiled in USThe BBC's Alastair Leithead attends a convention in Las Vegas to find out how the military and police will be using drones in the future.
Source: VIDEO: Robot pack mule unveiled in US (http://www.bbc.co.uk/news/world-us-canada-19169023#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa)