UK reveals footage of 'top secret' drone
5 February 2014 Last updated at 15:08 GMT
Footage of Britain's new unmanned drone in flight were revealed on Wednesday.
The Taranis uses the latest stealth technology and is capable of launching precision air strikes in hostile territory.
Flying invisible to radar, the Taranis can be operated via satellite link from anywhere the world.
The BBC's defence correspondent Jonathan Beale reports.