Pakistani Internal Security Department

A few days before 9/11, an Islamic radical named Mamdouh Habib is in Pakistan and calls his wife in Australia. Her phone is being monitored by Australian intelligence. In the conversation he says that something big is going to happen in the US in the next few days. He will be arrested after 9/11 and held by the US in the Guantanamo prison before finally being released in 2005. He will be released because his captors eventually will decide that he did not have any special foreknowledge or involvement in the 9/11 plot. He had been in Afghanistan training camps and had picked up the information there. The New York Times will paraphrase an Australian official, “Just about everyone in Kandahar [Afghanistan] and the Qaeda camps knew that something big was coming, he said. ‘There was a buzz.’”
[New York Times, 1/29/2005] Furthermore, according to The Australian, this call “mirrored several other conversations between accused terrorists that were tapped around the same time by the Pakistani Internal Security Department on behalf of the CIA.” This was part of what the CIA called a sharp increase in “chatter” intercepted from operatives in al-Qaeda training camps in Afghanistan and Pakistan in the days just before the attacks, alluding to an imminent big event. [Australian, 2/2/2005]