“Anybody visiting the Middle East in the last decade has had the experience: meeting the hoarse and aggressive person who first denies that Osama Bin Laden was responsible for the destruction of the World Trade Center and then proceeds to describe the attack as a justified vengeance for decades of American imperialism… professor Noam Chomsky decides to leave that central question open. We have no more reason to credit Osama Bin Laden's claim of responsibility, he states, than we would have to believe Chomsky's own claim to have won the Boston Marathon… Nothing serious," as Chomsky puts it, "has been provided since.".. So is one to assume that he [Chomsky] has pored through the completed findings of the 9/11 Commission? Viewed any of the videos in which the 9/11 hijackers are seen in the company of Bin Laden and Ayman al-Zawahiri? Read the transcripts of the trial of Zacarias Moussaoui, the so-called "20th hijacker"? Followed the journalistic investigations of Lawrence Wright, Peter Bergen, or John Burns, to name only some of the more salient? Acquainted himself with the proceedings of associated and ancillary investigations into the bombing of the USS Cole or indeed the first attempt to bring down the Twin Towers in the 1990s?”

citation needed

2011, Remarks on death of Osama bin Laden (May 2011)

July 01, 2007 http://littlegreenfootballs.com/weblog/?entry=26090_Daily_Kos_Kid_Gives_Shout_Out_to_Idiots&only

September 6, 2012 John Kerry’s speech to the Democratic National Convention, 2012 http://www.washingtonpost.com/politics/dnc-2012-john-kerrys-speech-to-the-democratic-national-convention-full-text/2012/09/06/bb73367e-f87c-11e1-a073-78d05495927c_story.html

This misquotation is frequently attributed to a White House press conference, March 13, 2002 http://georgewbush-whitehouse.archives.gov/news/releases/2002/03/20020313-8.html
Correct quote should read: "And, again, I don't know where he [Osama Bin Laden] is. I — I'll repeat what I said. I truly am not that concerned about him."
The relevant parts of the White House transcript reads:
: THE PRESIDENT: Deep in my heart I know the man is on the run, if he's alive at all. Who knows if he's hiding in some cave or not; we haven't heard from him in a long time. And the idea of focusing on one person is — really indicates to me people don't understand the scope of the mission. Terror is bigger than one person. And he's just — he's a person who's now been marginalized. His network, his host government has been destroyed. He's the ultimate parasite who found weakness, exploited it, and met his match. He is — as I mentioned in my speech, I do mention the fact that this is a fellow who is willing to commit youngsters to their death and he, himself, tries to hide — if, in fact, he's hiding at all. So I don't know where he is. You know, I just don't spend that much time on him, Kelly, to be honest with you. I'm more worried about making sure that our soldiers are well-supplied; that the strategy is clear; that the coalition is strong; that when we find enemy bunched up like we did in Shahikot Mountains, that the military has all the support it needs to go in and do the job, which they did.
: Q: But don't you believe that the threat that bin Laden posed won't truly be eliminated until he is found either dead or alive?
: THE PRESIDENT: Well, as I say, we haven't heard much from him. And I wouldn't necessarily say he's at the center of any command structure. And, again, I don't know where he is. I — I'll repeat what I said. I truly am not that concerned about him. I know he is on the run. I was concerned about him, when he had taken over a country. I was concerned about the fact that he was basically running Afghanistan and calling the shots for the Taliban.
Attributed, Misquotations

DoD News Briefing October 07, 2002 http://www.defenselink.mil/Transcripts/Transcript.aspx?TranscriptID=3786
2000s

Mount Union Theater, Ohio, April 18, 2007 http://web.archive.org/web/20070428010004/http://www.ohio.com/mld/ohio/news/17102685.htm

Speech to the Labour Party conference in Manchester, 28 September 2006. BBC News 28 September 2006 http://news.bbc.co.uk/1/hi/uk_politics/5388112.stm