IS OSAMA BIN LADEN REALLY DEAD???

Is Osama really dead. If so WHEN and HOW did he die?

I find it difficult to believe that the US would execute Osama Bin Laden and the proceed to destroy all the evidence ,then, dump the body into the sea. This story has all the elements of a lie. How can all these people who have been doubting that the president was born in the United States even with having seen a birth certificate, believe, with virtually hearsay evidence that Bin Laden was killed in Pakistan and disposed of at sea?  I'm even wondering if he wasn't already dead, possibly even before 9/11and now they want to eliminate the possibility of this being disclosed. For me it leaves the unanswered question;                      Where in the world is Osama Bin Laden?