For that matter, it was never in fact in our national security interests to invade Iraq at all.
Libya's willingness to give up its WMD program is essentially another step in the process that was started earlier this summer when it agreed to accept responsibility for the Lockerbie bombing and to pay $10m (£5.6m) in compensation to the relatives of each of the 270 people killed in the 1988 attack on the airliner.
It is far from clear precisely what WMD if any Tripoli may actually possess and the task of verification will fall to the International Atomic Energy Agency (IAEA) and the Organization for the Prohibition of Chemical Weapons.
How was Khan's network discovered?
Experts had suspected Khan for a long time, but couldn't confirm their suspicions until October 2003, when Italian authorities seized a German ship carrying 1,000 centrifuges headed for Libya. The parts were made in Malaysia and shipped through the Middle East, according to news reports. Libya was able to get nearly complete centrifuges through the network, as well as blueprints for a Pakistani-designed nuclear warhead.