The hunting of a ghost?

US 100 billion on hunting down Osama for 10 years, and they say, equivalent to putting a man on the moon, and then burying him at sea with no evidence left to prove, raises more questions than there are answers. Will it be like the famed moon walk, continue creating controversies, with none the wiser. Questions already being raised, was it just a ghost hunting with a cooked up assassination story; why did US waste 9 months planning when they seem to be aware where Osama was located. The version being put out by US seem to be changing by the minute, with errors in details. And to think that the US President was watching the operation live, and still the details are wrong!!