The CIA learns that two prominent Pakistani nuclear scientists have met with al-Qaeda leaders Osama bin Laden and Ayman al-Zawahiri in mid-August 2001, Secretary of State Colin Powell will tell Pakistani officials when he visits Pakistan in October this year (see Early October-December 2001). In the meeting, the two scientists, Sultan Bashiruddin Mahmood and Chaudiri Abdul Majeed, discussed helping al-Qaeda make a nuclear weapon (see Mid-August 2001). [Frantz and Collins, 2007, pp. 268-269] CIA Director George Tenet will confirm, in a 2007 book, that the CIA learned of this meeting prior to 9/11. He will write: “A Western intelligence service came to us in the fall of 2001 [with details of the meeting].… [The] CIA pressed the Pakistanis to confront Mahmood and Majeed with this new information. We put [evidence that a charity named Ummah Tameer-e-Nau run by Mahmood and Majeed tried to sell Libya a nuclear weapon] on the table. We also passed new information that had been collected by other intelligence services. To no avail. Then 9/11 struck and there was no slowing down in this pursuit.” [Tenet, 2007, pp. 264] No evidence will be presented showing that President Bush or other top US officials are warned of this, or that there are any general warnings inside the US government about this. Pakistan is not successfully pressured about it before 9/11 (in fact, the Pakistani ISI already knows about it and has failed to warn the US (see Between Mid-August and September 10, 2001)), and after 9/11 the only action Pakistan will take is to twice arrest and then quickly release the two scientists. Authors Adrian Levy and Catherine Scott-Clark will comment in a 2007 book, “This information, added to the missing canisters of highly enriched uranium [in Pakistan], might have been sufficient to redirect” top Bush officials to take sterner action against al-Qaeda before 9/11. [Levy and Scott-Clark, 2007, pp. 311]