Joint Strike Fighter: High-tech deadly eye in the sky
The BBC has been given exclusive access to film the world's most advanced fighter jet - the F-35 Joint Strike Fighter, built by Lockheed Martin for the US and UK military.
Britain had planned to buy around 150 aircraft for the RAF and Royal Navy - but with each plane costing at least £70m that number is likely to fall.
Although it looks like most other modern jet fighters, what makes the F-35 stand out is its software and intelligence-gathering capabilities.
Dr Jon Waldrop of Lockheed Martin told Jonathan Beale about the electronics that make such a difference to the JSF.