I am deeply, deeply "troubled" = NOT worried actually, so much as distrusting or skeptical = by the simple fact that OBL HASN'T been seen, photographed, put on the cell phone, or taped doing anything for so long.
Here we (supposedly) have this super-terrorist (and terrorism DEMANDS public exposure and public acts to maintain itself) .... who is pure and simply invisible.
I can't prove WHY he's invisible, but he's invisible. Dead? trapped underground?
It's more and more likely every day.