R2-D2 to go on sale in Star Wars auction

An R2-D2 droid that has appeared in several of the Star Wars movies is to go on auction in the US.

Luke Skywalker's lightsaber, Darth Vader's helmet and shoulder armour, as well as imperial and rebel weapons will also go under the hammer, but the centrepiece is no doubt the squat blue, white and silver droid famous for communicating in a series of electronic beeps and squeaks.