US Senator Scott Brown confirmed that this was the image he was shown as part of an official US government briefing to the Senate Armed Services Committee.

 

Brown, a member of the Senate Armed Services Committee, suggested he had viewed them as part of an official briefing, and he argued that they were too graphic to be released to the public and could inflame terrorists. Oops.
Brown later acknowledged that he had fallen victim to a hoax, apparently the same doctored images that were making the rounds on the Internet.

And here is how the fake was made! 

 The mouth and beard from a photo of the real Bin Laden in the mid 80s was photoshopped onto the head of another dead man. 

And here is the Final Fake Photo in all its Glory!!