If you think that on the 10th anniversary you know the whole story of 9/11 - and here I'm addressing conspiracy-minded truthers" and the 13 percent who approved of the job Dick Cheney did as vice president - actually, you don't. The dictum of famed investigative reporter I.F. Stone about all governments - i.e., they lie - is no less true about 9/11 than any other event. Here are [some] questions about 9/11 that remain unanswered. Who killed five Americans with anthrax in fall 2001? Forensics showed that the biological weapon came from American stockpiles. In 2008, the government announced that its ... prime suspect - a scientist at Maryland's Fort Detrick named Bruce Ivins - had committed suicide and that the case was considered closed. But is it? Remarkably, a disputed U.S. Justice Department filing just this July claimed that Ivins didn't have access to the equipment needed to execute the attacks, causing some members of Congress to call for a new probe. Why did so many Bush officials fixate on Iraq in the hours after the attacks? Despite a lack of any evidence tying Saddam's Iraq to 9/11, Bush administration officials looked immediately toward Baghdad. Defense Secretary Donald Rumsfeld questioned whether to "hit S.H." - Saddam - "at the same time" while the Pentagon was still on fire, and Bush immediately pressed Clarke on whether there was an Iraqi connection.