WASHINGTON: Pakistan's intelligence officials knew in advance about the 9/11 attacks, a well-known American analyst has said, based on a ''stunning document'' that he claims was given by a Pakistani source to the 9/11 Commission on the eve of the publication of its report. The document, from a high-level, but anonymous Pakistani source, also claims that Osama bin Laden has been receiving periodic dialysis in a military hospital in Peshawar, says Arnaud de Borchgrave, editor-at-large of the news agency UPI. ''The imprints of every major act of international Islamist terrorism invariably passes through Pakistan, right from 9/11 - where virtually...