I hate it when you have to repeatedly refute idiocy, but apparently when it comes to Obama's birth certificate, we must.
Because various nut jobs wielding weapons happen to believe the President wasn't born in the USA, this crazy rumor has risen again from what I thought was an ash heap. So in lovely living color, there it is above: Obama's Birth Certificate. (And here's another DETAILED photo.)
And here are various investigative articles to show that, hard as the journalists tried, they kept coming up with the same answer. It's a valid birth certificate.
Any journalist who COULD have proved it a forgery would have the scoop of the century. However, proving someone is an American is easy, and the President has accomplished this repeatedly by getting a driver's license, a passport, membership in the Bar, etc. But throughout time, evidence has never made much difference to a bigot.