assive attention has now been given - and rightly so - to the reasons why Britain went to war against Iraq. But far too little attention has focused on why the US went to war, and that throws light on British motives too. The conventional explanation is that after the Twin Towers were hit, retaliation against al-Qaida bases in Afghanistan was a natural first step in launching a global war against terrorism. Then, because Saddam Hussein was alleged by the US and UK governments to retain weapons of mass destruction, the war could be extended to Iraq as well. However this theory does not fit all the facts. The truth may be a great deal murkier.

We now know that a blueprint for the creation of a global Pax Americana was drawn up for Dick Cheney (now vice-president), Donald Rumsfeld (defense secretary), Paul Wolfowitz (Rumsfeld's deputy), Jeb Bush (George Bush's younger brother) and Lewis Libby (Cheney's chief of staff). The document, entitled Rebuilding America's Defenses, was written in September 2000 by the neoconservative think tank, Project for the New American Century (PNAC).

The plan shows Bush's cabinet intended to take military control of the Gulf region whether or not Saddam Hussein was in power. It says "while the unresolved conflict with Iraq provides the immediate justification, the need for a substantial American force presence in the Gulf transcends the issue of the regime of Saddam Hussein."

The PNAC blueprint supports an earlier document attributed to Wolfowitz and Libby which said the US must "discourage advanced industrial nations from challenging our leadership or even aspiring to a larger regional or global role". It refers to key allies such as the UK as "the most effective and efficient means of exercising American global leadership". It describes peacekeeping missions as "demanding American political leadership rather than that of the UN". It says "even should Saddam pass from the scene", US bases in Saudi Arabia and Kuwait will remain permanently... as "Iran may well prove as large a threat to US interests as Iraq has". It spotlights China for "regime change", saying "it is time to increase the presence of American forces in SE Asia".

The document also calls for the creation of "US space forces" to dominate space, and the total control of cyberspace to prevent "enemies" using the internet against the US. It also hints that the US may consider developing biological weapons "that can target specific genotypes [and] may transform biological warfare from the realm of terror to a politically useful tool".

Finally - written a year before 9/11 - it pinpoints North Korea, Syria and Iran as dangerous regimes, and says their existence justifies the creation of a "worldwide command and control system". This is a blueprint for US world domination. But before it is dismissed as an agenda for rightwing fantasists, it is clear it provides a much better explanation of what actually happened before, during and after 9/11 than the global war on terrorism thesis. This can be seen in several ways.

First, it is clear the US authorities did little or nothing to pre-empt the events of 9/11. It is known that at least 11 countries provided advance warning to the US of the 9/11 attacks. Two senior Mossad experts were sent to Washington in August 2001 to alert the CIA and

FBI to a cell of 200 terrorists said to be preparing a big operation (Daily Telegraph, Sep.16 2001). The list they provided included the names of four of the 9/11 hijackers, none of whom was arrested.

It had been known as early as 1996 that there were plans to hit Washington targets with airplanes. Then in 1999 a US national intelligence council report noted that "al-Qaida suicide bombers could crash-land an aircraft packed with high explosives into the Pentagon, the headquarters of the CIA, or the White House".

Fifteen of the 9/11 hijackers obtained their visas in Saudi Arabia. Michael Springman, the former head of the American visa bureau in Jeddah, has stated that since 1987 the CIA had been illicitly issuing visas to unqualified applicants from the Middle East and bringing them to the US for training in terrorism for the Afghan war in collaboration with Bin Laden (BBC, November 6 2001). It seems this operation continued after the Afghan war for other purposes. It is also reported that five of the hijackers received training at secure US military installations in the 1990s (Newsweek, September 15 2001).

Instructive leads prior to 9/11 were not followed up. French Moroccan flight student Zacarias Moussaoui (now thought to be the 20th hijacker) was arrested in August 2001 after an instructor reported he showed a suspicious interest in learning how to steer large airliners. When US agents learned from French intelligence he had radical Islamist ties, they sought a warrant to search his computer, which contained clues to the September 11 mission (Times, November 3 2001). But they were turned down by the FBI. One agent wrote, a month before 9/11, that Moussaoui might be planning to crash into the Twin Towers (Newsweek, May 20 2002).

All of this makes it all the more astonishing - on the war on terrorism perspective - that there was such slow reaction on September 11 itself. The first hijacking was suspected at not later than 8.20am, and the last hijacked aircraft crashed in Pennsylvania at 10.06am. Not a single fighter plane was scrambled to investigate from the US Andrews Air Force base, just 10 miles from Washington DC, until after the third plane had hit the Pentagon at 9.38 am. Why not? There were standard FAA intercept procedures for hijacked aircraft before 9/11. Between September 2000 and June 2001 the US military launched fighter aircraft on 67 occasions to chase suspicious aircraft (AP, August 13 2002). It is a US legal requirement that once an aircraft has moved significantly off its flight plan, fighter planes are sent up to investigate.

Was this inaction simply the result of key people disregarding, or being ignorant of, the evidence? Or could US air security operations have been deliberately stood down on September 11? If so, why, and on whose authority? The former US federal crimes prosecutor, John Loftus, has said: "The information provided by European intelligence services prior to 9/11 was so extensive that it is no longer possible for either the CIA or FBI to assert a defense of incompetence."