Iranians caught in a photoshop lie?

http://english.alarabiya.net/articles/2013/02/13/266089.html

http://www.telegraph.co.uk/news/worldnews/middleeast/iran/9866347/Irans-flight-of-fancy-as-image-of-new-fighter-jet-is-faked.html

Telegraph claims that images of the new Iranian stealth fighter flying over mountains is a fake photoshopped image. Earlier reports raised doubts that the thing was anything more than a static mop-up.

Now, here's the point. If the Iranians will lie about this jet, are we to believe that they wouldn't lie about a nuclear weapons program?