Mahmoud Ahmad is the ex-head of the Directorate for Inter-Services Intelligence (ISI) in Pakistan and was in charge of the ISI prior to, and at the time of the 9/11 attacks. Ahmad is widely reported to have been in America on regular 'visits of consultation' with senior officals in the U.S. administration in the weeks before and after 9/11.
When the attacks occurred on September 11, 2001, Republican Congressman Porter Gross, Democratic Senator Bob Graham and Mahmoud Ahmad were having breakfast in Washington, discussing Osama bin Laden.
In early October 2001, Indian intelligence learned that Mahmoud Ahmad had ordered Saeed Sheikh - the convicted mastermind of the kidnapping and killing of Wall Street Journal reporter Daniel Pearl - to wire US$100,000 from Dubai to one of hijacker Mohamed Atta's two bank accounts in Florida.
An Asia Times story says the "US Federal Bureau of Investigation (FBI) has confirmed the whole story: Indian intelligence even supplied Saeed's cellular-phone numbers".
The original India Times story is reproduced below for posterity.
India helped FBI trace ISI-terrorist links
MANOJ JOSHI, TIMES NEWS NETWORK
TUESDAY, OCTOBER 09, 2001 11:08:55 PM
NEW DELHI: While the Pakistani Inter Services Public Relations claimed that former ISI director-general Lt-Gen Mahmud Ahmad sought retirement after being superseded on Monday, the truth is more shocking.
Top sources confirmed here on Tuesday, that the general lost his job because of the "evidence" India produced to show his links to one of the suicide bombers that wrecked the World Trade Centre. The US authorities sought his removal after confirming the fact that $100,000 were wired to WTC hijacker Mohammed Atta from Pakistan by Ahmad Umar Sheikh at the instance of Gen Mahumd.
Senior government sources have confirmed that India contributed significantly to establishing the link between the money transfer and the role played by the dismissed ISI chief. While they did not provide details, they said that Indian inputs, including Sheikh’s mobile phone number, helped the FBI in tracing and establishing the link.
A direct link between the ISI and the WTC attack could have enormous repercussions. The US cannot but suspect whether or not there were other senior Pakistani Army commanders who were in the know of things. Evidence of a larger conspiracy could shake US confidence in Pakistan’s ability to participate in the anti-terrorism coalition.
Indian officials say they are vitally interested in the unravelling of the case since it could link the ISI directly to the hijacking of the Indian Airlines Kathmandu-Delhi flight to Kandahar last December. Ahmad Umar Sayeed Sheikh is a British national and a London School of Economics graduate who was arrested by the police in Delhi following a bungled 1994 kidnapping of four westerners, including an American citizen.
The Antagonist thinks this information is worth a little recap, just in case anyone's missed the point, so here it is.
The head of Pakistani intelligence ordered the guy convicted of kidnapping and killing an american journalist that may have inadvertently stumbled on the missing link between the US and the 9/11 attacks to transfer $100,000 to lead 9/11 hijacker Mohammed Atta, and was having a breakfast meeting with american senators and congressmen, discussing Osama Bin Laden, while the September 11 attacks were happening.
Yet, despite this information being available since October 2001, complete with mainstream news reports to support it all, the general consensus of opinion seems to be that this guy did it.