[fatchuck]

See:

http://www.truthorfiction.com/rumors/o/obama-afghanistan.htm

for the whole story.

Oh well, at least the unfettered capitalism of P.T. Barnum’s “There’s a sucker born every minute” seems to be alive and well.

[Kozak]

see 14.

[nuconvert]

It’s possible that the first 6 paragraphs of this article may come from a fictionalized letter (though your link’s verification of the story comes from an Obama person, so who knows).
However, the article is about 40 paragraphs long, so read on

[Cyber Liberty]

Snopes rubbished the story as well. I wish Timmerman didn’t start off an otherwise good story with this bit of urban myth.