As if Bush claiming he'd died would convince you. Why would the CIA disassemble Alec Station if they didn't come to the conclusion that it was wasting resources chasing a ghost? Why wouldn't Obama REassemble something equivelent to Alec Station if he didn't think OBL was dead? For that matter, why do you think that capturing or killing OBL went from Obama's "biggest national security priority" (Oct. 7, 2008) to "I think that we have to so weaken [bin Laden's] infrastructure that, whether he is technically alive or not, he is so pinned down that he cannot function" (Jan. 14, 2009)? Maybe he learned something during the transition? Why do you suppose OBL hasn't made a video tape of him speaking about contemporaneous events since the 2004 video (which was widely questioned). There are believable accounts of OBL being gravely injured in Tora Bora and we've had 8 years of Predator strikes of al Q and Taliban camps, of which we don't regularly recover bodies for DNA analysis. But you draw the conclusion he's still alive based solely on the fact that we haven't found a body (I can see you're totally unfamiliar with the topography of the region and the operational priorities of our units). So, maybe he is still alive, living on a deserted Island with Amelia Earhart.