Iranians need some Photoshop training

Did anyone else read this story, about how it appears a photoshopped image of the recent Iranian missile test made its way onto the front pages of most major US news outlets?

I find it interesting that:

1. The Iranian state media would release such an obviously altered image, knowing it was going to get international scrutiny, and
2. US media outlets, such as the NY Times, Yahoo News, LA Times, and many others, were so quick to post such an image on their front pages without enough investigation into its integrity to reveal some pretty clear evidence of digital tampering.

As the story explains:
Agence France-Presse retracted its four-missile version this morning, saying that the image was “apparently digitally altered” by Iranian state media. The fourth missile “has apparently been added in digital retouch to cover a grounded missile that may have failed during the test,” the agency said. Later, it published an article quoting several experts backing that argument.