Because they photoshopped a stock image??? Seriously? You understand how journalism and blogging works, right?
Photoshopping an image and not captioning it as an "artist's concept" or something similar is absolutely a violation of traditional journalistic integrity.
This is not a picture of a "Google Blimp." It's not even a picture of a blimp in Africa.
Wired should have just posted an abstract sketch, something that says "blimp" but is clearly not pretending to be a "GBlimp".
That picture is not a free-flying blimp, but an Army aerostat (tethered balloon). About 10 are used to enforce the southern US border.