How can a man who died in late 2001 or in early 2002 have been killed again by Seal Team 6 on May 2, 2011? That is the mystery of Osama bin Laden.
States Dick Gregory, in a YouTube video clip (hopefully embedded at top):
So those of us that know what’s going on, we knew that bin Laden was killed December 2001 by Sheik Ammar, the same guy who beheaded [Danny] Pearl. So now all at once we come up, less than two years ago, and they switched to the White House and they showed the President and that group of thugs he has around him looking at the killing of bin Laden! (The President doesn’t know most of the stuff that’s going on. They told him and he bought into it.) Bin Laden was killed in 2001, and all that stuff they talk about Navy SEALS went in there and six of them went to the top floor and took him out, then who was that?? That was a lie! It’s so big, they can’t afford to let that lie get out. All six of the Navy SEALS were killed here in America! Five of them they say went down on a helicopter. And the sixth one was shot in the head on a rifle range of the Navy SEALS doing target practice. And they ‘accidentally’ shot him in the head.
The “Sheikh Ammar” referred to by Dick Gregory seems to be Ali Abdul Aziz Ali, known as Ammar. He is the nephew of Khalid Sheikh Mohammed, who reportedly did the actual beheading of Danny Pearl. Ammar, the nephew, “allegedly filmed Danny’s death…” 
A CBS News report dated January 28, 2002 (hopefully embedded above) had “exclusive information” about the doings of OBL in the hours before “9/11”. The report by Barry Petersen claimed OBL was in Pakistan getting medical treatment. He was in a military hospital getting kidney dialysis. “Those who know bin Laden say he suffers from numerous ailments, back, and stomach problems,” reported Petersen. In late 2001/early 2002, OBL seemed “near death.”
“Two months before September 11 Osama bin Laden flew to Dubai for 10 days for treatment at the American hospital, where he was visited by the local CIA agent, according to the French newspaper Le Figaro.”  Agence France Presse (AFP) also reported that OBL had been treated in July 2001 at Dubai American Hospital. So did Radio France International. 
To get revenge upon France for such reports, the George W. Bush Administration began to call french fries “freedom fries.”
But if Osama was dead circa 2001/2002, then what about those videos we later kept seeing of him from time to time, in which he threatened hellfire and damnation to the United States? Those later videos were “Virtual Osama”, a bogeyman, a mythical creature in many cultures used by adults or older children to frighten bad children into good behavior. Whenever enthusiasm for “War on Terror” began to wane, a video of the Big Bad Wolf would appear.
But over the years, Big Bad Wolf kept getting older. By 2011, the Virtual Osama would have to admit to 54 years of age. The wolf was losing his teeth. It was time he be retired. Also, in 2011, President Barack Obama was approaching a 2012 re-election contest. The macho George W. Bush had promised to “get” Osama bin Laden, “dead or alive.” But macho man Bush had failed. However if Barack Obama could “get” OBL and hang the trophy over his fireplace, then that would make him more of a macho man than even “Dubya” Bush!
So on May 2, 2011 the Bamster “got” OBL and hung the trophy over his re-election fireplace. Then, on May 21, 2015 the Seymour Hersh report questioning the official version of “death of Osama” premiered in the London Review of Books. Wow! What would Rush Limbaugh say? He is always bashing Obama on his radio show, and now Hersh had handed Limbaugh new ammunition. Listeners tuned in for words of commentary on the Hersh blockbuster.
And heard nothing. Nothing was said by their good buddy Rush regarding the Seymour Hersh exposé and its implication of President Obama having lied. Why this would be is, if Rush Limbaugh had gone in that direction, it would have opened up a whole can of worms. In the second of the televised 1960 debates between John F. Kennedy and Richard Nixon, JFK charged, “The Republicans have allowed a communist dictatorship to flourish eight jet minutes from our borders!” But secretly JFK already knew about the Bay of Pigs invasion plan. JFK had already been briefed by Allen Dulles. JFK also knew that Nixon could not publicly say, “Not true… We have a Bay of Pigs invasion plan.” And JFK knew that Nixon was stuck and could not honestly respond to the charge.  The same sort of tricky situation is why Rush Limbaugh dared not use the Hersh exposé for his routine Obama bashing. If Limbaugh went there, the Democrats could delve into Osama bin Laden having been dead and yet the Bush Administration lying about that! Limbaugh dared not risk boomeranging repercussions striking his Republican Party pals.
“You might expect conservatives to run with the dark comedy of the Obama White House scrambling to make up lies to take advantage of the death of America’s No. 1 foe in an election year—only to watch those lies spiral out of control and create more foreign policy problems. But Rush Limbaugh led his show on Monday by talking about the usual stuff, Michelle Obama playing the ‘race card’ or whatever.” 
——- Sources ——-
 “This is Danny Pearl’s Final Story”, by Asra Q. Omani. http://www.washingtonian.com/projects/KSM/
 “CIA agent alleged to have met Bin Laden in July”, by Anthony Sampson. The Guardian (US edition, online), October 31, 2001. http://www.theguardian.com/world/2001/nov/01/afghanistan.terrorism
 For Osama bin Laden treated in July 2001 at Dubai American Hospital, see, 9/11 Synthetic Terror, by Webster Griffin Tarpley. Progressive Press, 2005.
 “The Kennedy-Nixon Debates: JFK Lied, Cubans Died”, by Humberto Fontova. Townhall, September 27, 2010. http://tinyurl.com/n86c8w5
 “The Loneliness of Sy Hersh”, by Elspeth Reeve. New Republic (online), May 12, 2015. http://www.newrepublic.com/article/121771/loneliness-sy-hersh