In the late 80s, in the course of tracking down smugglers of WMD components, Barlow uncovered reams of material that related to Pakistan. It was known the Islamic Republic had been covertly striving to acquire nuclear weapons since India's explosion of a device in 1974 and the prospect terrified the west - especially given the instability of a nation that had had three military coups in less than 30 years . Straddling deep ethnic, religious and political fault-lines, it was also a country regularly rocked by inter-communal violence. "Pakistan was the kind of place where technology could slip out of control," Barlow says.

He soon discovered, however, that senior officials in government were taking quite the opposite view: they were breaking US and international non-proliferation protocols to shelter Pakistan's ambitions and even sell it banned WMD technology. In the closing years of the cold war, Pakistan was considered to have great strategic importance. It provided Washington with a springboard into neighbouring Afghanistan - a route for passing US weapons and cash to the mujahideen, who were battling to oust the Soviet army that had invaded in 1979. Barlow says, "We had to buddy-up to regimes we didn't see eye-to-eye with, but I could not believe we would actually give Pakistan the bomb."....

Next he discovered that the Pentagon was preparing to sell Pakistan jet fighters that could be used to drop a nuclear bomb.

Barlow was relentless in exposing what he saw as US complicity, and in the end he was sacked and smeared as disloyal, mad, a drunk and a philanderer....

As the first Gulf war came to an end with no regime change in Iraq, a group of neoconservatives led by Paul Wolfowitz, Dick Cheney, Lewis "Scooter" Libby and Donald Rumsfeld were already lobbying to finish what that campaign had started and dislodge Saddam. Even as the CIA amassed evidence showing that Pakistan, a state that sponsored Islamist terrorism and made its money by selling proscribed WMD technology, was the number one threat, they earmarked Iraq as the chief target.

When these neocons came to power in 2001, under President George W Bush, Pakistan was indemnified again, this time in return for signing up to the "war on terror". Condoleezza Rice backed the line, as did Rumsfeld, too. Pakistan, although suspected by all of them to be at the epicentre of global instability, was hailed as a friend. All energies were devoted to building up the case against Iraq...'